Sample size AB test.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Lập trình thống kê cơ bản\n",
    "\n",
    "## Ước tính cỡ mẫu cho thí nghiệm can thiệp 2 phân nhóm/2 thời điểm\n",
    "\n",
    "\n",
    "### BS. Lê Ngọc Khả Nhi\n",
    "\n",
    "# Giới thiệu\n",
    "\n",
    "Trong nghiên cứu y học lâm sàng, một vấn đề thường gặp là khảo sát hiệu ứng của một can thiệp điều trị. Bài toán này thường được giải quyết thông qua một thí nghiệm đơn giản, trong đó ta chia ngẫu nhiên n bệnh nhân thành 2 phân nhóm A, B. Phân nhóm A không có can thiệp, hoặc sử dụng Placebo, phân nhóm B nhận can thiệp (phẫu thuật, phác đồ điều trị). Hiệu quả điều trị được khảo sát thông qua một đại lượng lâm sàng Y là biến số liên tục. Y được khảo sát tại 2 thời điểm/điều kiện - t0 = ban đầu (trước khi can thiệp, baseline) và t1 = sau khi can thiệp. Hiệu ứng can thiệp trung bình được ước tính bằng khác biệt giữa 2 mức độ thay đổi Y giữa t1-t0 của mỗi phân nhóm.\n",
    "\n",
    "Bài thực hành hôm nay Nhi sẽ hướng dẫn các bạn lập trình thủ công bằng ngôn ngữ Python để mô phỏng ước tính cỡ mẫu cho thí nghiệm trên.\n",
    "\n",
    "# Phân tích bài toán"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Giả thuyết và tham số trong bài toán\n",
    "\n",
    "Trong bài toán này, có những tham số như sau:\n",
    "\n",
    "Mục tiêu của kiểm định thống kê là hiệu ứng điều trị, $\\delta$ (delta)\n",
    "\n",
    "$H_0:\\delta =0$\n",
    "\n",
    "$H_1:\\delta\\neq0$\n",
    "\n",
    "Hiệu ứng delta được định nghĩa như giá trị tuyệt đối khác biệt giữa 2 thay đổi trung bình $\\mu_{2}$ và $\\mu_{1}$\n",
    "\n",
    "$$\\delta = \\left | \\mu_{2} - \\mu_{1}\\right |$$\n",
    "\n",
    "Thí dụ phân nhóm B có 5 bệnh nhân, \n",
    "\n",
    "ở thời điểm t0 (trước can thiệp), giá trị YB0 = \n",
    "[5.56162422, 3.93309074, 3.31832627, 6.40175127, 3.35071644]\n",
    "\n",
    "ở thời điểm t1 (sau can thiệp), giá trị YB1 = \n",
    "[7.54076255, 4.0976205 , 6.31251746, 7.86178527, 6.01684101]\n",
    "\n",
    "Ta sẽ có trung bình thay đổi muB = 1.85280357\n",
    "\n",
    "Giả sử ở phân nhóm A, giá trị trung bình muA  chỉ có 0.5, ta có delta = 1.35 đơn vị\n",
    "\n",
    "Tuy nhiên, ngoài 2 tham số mu1, mu2, ta còn có 3 tham số khác, đó là sigma1 và sigma2 tương ứng với độ lệch chuẩn của thay đổi ở mỗi phân nhóm; và rho, là hệ số tương quan giữa 2 thời điểm ban đầu (baseline) và sau trong phân nhóm được can thiệp (nhóm B).\n",
    "\n",
    "## Công thức tính cỡ mẫu\n",
    "\n",
    "Cỡ mẫu n cho mỗi phân nhóm được ước tính bằng công thức sau (Rosner B. 2006)\n",
    "\n",
    "$$n=\\frac{2 \\times \\sigma_{d}^2 (Z_{1-\\alpha/2} + Z_{1 - \\beta})^2}{\\delta^2}$$\n",
    "\n",
    "Với: $\\sigma_{d}$ là độ lệch chuẩn của hiệu ứng can thiệp $\\delta$ \n",
    "\n",
    "$$\\sigma_{d} = \\sigma_{1}^{2} + \\sigma_{2}^{2} - 2.\\rho .\\sigma_{1}.\\sigma_{2}$$\n",
    "\n",
    "Trong đó:\n",
    "\n",
    "$\\mu_{1}$ và $\\mu_{2}$ là trung bình của thay đổi giữa thời điểm ban đầu (baseline)/trước can thiệp và thời điểm sau can thiệp (post) của 2 phân nhóm 1 và 2.\n",
    "\n",
    "$\\sigma_{1}$ và $\\sigma_{2}$ là độ lệch chuẩn của sự thay đổi giữa thời điểm ban đầu (baseline)/trước can thiệp và thời điểm sau can thiệp (post) của 2 phân nhóm 1 và 2.\n",
    "\n",
    "$\\delta$ là giá trị tuyệt đối của hiệu số giữa $\\mu_{1}$ và $\\mu_{2}$, hay nói cách khác, là hiệu ứng của can thiệp mà ta cần khảo sát.\n",
    "\n",
    "$\\rho$ là hệ số tương quan giữa 2 thời điểm ban đầu (baseline) và sau của riêng phân nhóm được can thiệp; có thể dao động từ 0 đến 1\n",
    "\n",
    "$\\alpha$ là Type I error; giá trị mặc định là 0.05\n",
    "\n",
    "$\\beta$ là Type II error, từ đó 1−β là power; giá trị mặc định = 0.2\n",
    "\n",
    "$Z_p$ là bách phân vị thứ p của phân phối chuẩn hóa (standard normal)\n",
    "\n",
    "# Lập trình hàm tính cỡ mẫu\n",
    "\n",
    "Nhi viết hàm để áp dụng công thức trên, nhằm ước tính tổng cỡ mẫu cho 2 phân nhóm A,B từ các tham số."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "import numpy as np\n",
    "from scipy.stats import norm\n",
    "\n",
    "import matplotlib.pyplot as plt\n",
    "\n",
    "%config InlineBackend.figure_format = 'svg'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "def sample_size_paired(mu1: float,\n",
    "                       mu2: float,\n",
    "                       sigma1: float,\n",
    "                       sigma2: float,\n",
    "                       rho = 0.5, \n",
    "                       alpha = 0.05,\n",
    "                       beta = 0.2):\n",
    "    \n",
    "    delta = abs(mu2 - mu1)\n",
    "    \n",
    "    sigmad2 = sigma1**2 + sigma2**2 - 2*rho*sigma1*sigma2\n",
    "    \n",
    "    za = norm.ppf(1 - alpha*0.5)\n",
    "    zb = norm.ppf(1 - beta)\n",
    "        \n",
    "    n = 2*sigmad2*(za+zb)**2/(delta**2)\n",
    "    \n",
    "    return 2*n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Ước tính cỡ mẫu cho 1 giả định duy nhất\n",
    "\n",
    "Giả sử từ thông tin y văn cho một thí nghiệm khảo sát hiệu quả điều trị của loại thuốc X trên biomarker Y, ta biết trung bình thay đổi ở nhóm Placebo = 4, độ lệch chuẩn = 3.5; trung bình thay đổi ở nhóm điều trị = 7.5, độ lệch chuẩn = 5; hệ số tương quan rho giả định = 0.5 (nếu không có thông tin), ta dça_(t alpha = 0.05, beta = 0.2 với kì vọng power = 0.8. Kết quả cho ra là n = 50.6; như vậy cần khoảng 25 bệnh nhân cho mỗi phân nhóm."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "50.6172652255982"
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "sample_size_paired(mu1 = 4,\n",
    "                mu2 = 7.5,\n",
    "                sigma1 = 3.5,\n",
    "                sigma2 = 5,\n",
    "                rho = 0.5,\n",
    "                alpha = 0.05,\n",
    "                beta = 0.2)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Mô phỏng cho nhiều giả định\n",
    "\n",
    "Trên thực tế, không bao giờ ta chỉ ước tính 1 cỡ mẫu cho 1 giả định duy nhất, nhưng cần phải mô phỏng cho hàng loạt giả định, dao động xung quanh 1 giả định trung tâm mà ta kì vọng/tin tưởng; sau đó ta phải đối chiếu và cân bằng giữa kết quả mô phỏng và tính khả thi của dự án, như kinh phí, nhân lực, thời gian... để chọn một giá trị cỡ mẫu tối ưu.\n",
    "\n",
    "Để thực hiện mô phỏng trực quan, Nhi viết 1 hàm cho phép biểu diễn khuynh hướng thay đổi của giá trị cỡ mẫu tùy theo 6 tham số trong bài toán, bao gồm mu1, mu2, sigma1, sigma2, hiệu ứng delta, rho."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [],
   "source": [
    "def plot_ss_paired(mu1: float,\n",
    "                   mu2: float,\n",
    "                   sigma1: float,\n",
    "                   sigma2: float,\n",
    "                   rho = 0.5,\n",
    "                   alpha = 0.05, \n",
    "                   beta = 0.2,\n",
    "                   y_name = 'Biomarker Y', \n",
    "                   g=['Baseline','Post']):\n",
    "    \n",
    "    n_est = sample_size_paired(mu1, mu2, sigma1, sigma2, rho, alpha, beta)\n",
    "    \n",
    "    delta = abs(mu2 - mu1)\n",
    "    sigma_d = (sigma1**2 + sigma2**2 - 2*rho*sigma1*sigma2)**0.5\n",
    "    \n",
    "    m1 = np.linspace(0.8*mu1, mu1*1.2, num=50)\n",
    "    m2 = np.linspace(0.8*mu2, mu2*1.2, num=50)\n",
    "    ds = np.abs(m2 - m1)\n",
    "    s1 = np.linspace(sigma1 - (sigma1/2), sigma1 + (0.7*sigma1), num=50)\n",
    "    s2 = np.linspace(sigma2 - (sigma2/2), sigma2 + (0.7*sigma2), num=50)\n",
    "    rs =  np.linspace(0.1,1,num=50)\n",
    "    \n",
    "    fig, axs = plt.subplots(2,3, figsize=(10,6))\n",
    "    \n",
    "    fig.suptitle(f\"Hiệu quả can thiệp giữa 2 thời điểm {g[1]} và {g[0]}\")\n",
    "    \n",
    "    axs[0,0].set_ylabel('Cỡ mẫu ước tính')\n",
    "    axs[0,0].set_xlabel(\"Trung bình thay đổi nhóm chứng\")\n",
    "    \n",
    "    axs[0,1].set_ylabel('Cỡ mẫu ước tính')\n",
    "    axs[0,1].set_xlabel(\"Trung bình thay đổi nhóm can thiệp\")\n",
    "    \n",
    "    axs[0,2].set_ylabel('Cỡ mẫu ước tính')\n",
    "    axs[0,2].set_xlabel(\"Hiệu ứng delta\")\n",
    "    \n",
    "    axs[1,0].set_ylabel('Cỡ mẫu ước tính')\n",
    "    axs[1,0].set_xlabel(\"Độ lệch chuẩn thay đổi nhóm chứng\")\n",
    "    \n",
    "    axs[1,1].set_ylabel('Cỡ mẫu ước tính')\n",
    "    axs[1,1].set_xlabel('Độ lệch chuẩn thay đổi nhóm can thiệp')\n",
    "    \n",
    "    axs[1,2].set_ylabel('Cỡ mẫu ước tính')\n",
    "    axs[1,2].set_xlabel(\"Hệ số tương quan rho nhóm can thiệp\")\n",
    "    \n",
    "    for b in [0.05,0.1,0.2,0.25,0.3,]:\n",
    "        \n",
    "        sample1a = [sample_size_paired(mu1 = x, mu2 = mu2, sigma1= sigma1, sigma2= sigma2, alpha = 0.05, beta = b) for x in m1]\n",
    "        axs[0,0].plot(m1, sample1a, label = f'power: {1-b}')\n",
    "        axs[0,0].vlines(mu1,0, max(sample1a), colors='k', linestyles='dashed', lw=0.8)\n",
    "        axs[0,0].hlines(n_est,min(m1), max(m1), colors='k', linestyles='dashed', lw=0.8)\n",
    "        \n",
    "        sample1b = [sample_size_paired(mu1 = mu1, mu2 = x, sigma1= sigma1, sigma2= sigma2, alpha = 0.05, beta = b) for x in m2]\n",
    "        axs[0,1].plot(m2, sample1b, label = f'power: {1-b}')\n",
    "        axs[0,1].vlines(mu2,0, max(sample1b), colors='k', linestyles='dashed', lw=0.8)\n",
    "        axs[0,1].hlines(n_est,min(m2), max(m2), colors='k', linestyles='dashed', lw=0.8)\n",
    "        \n",
    "        sample1c = [sample_size_paired(mu1 = mu1/2, mu2 = mu1/2 + x, sigma1= sigma1, sigma2= sigma2, alpha = 0.05, beta = b) for x in ds]\n",
    "        axs[0,2].plot(ds, sample1c, label = f'power: {1-b}')\n",
    "        axs[0,2].vlines(delta,0, max(sample1c), colors='k', linestyles='dashed', lw=0.8)\n",
    "        axs[0,2].hlines(n_est,min(ds), max(ds), colors='k', linestyles='dashed', lw=0.8)\n",
    "        \n",
    "        sample2 = [sample_size_paired(mu1 = mu1, mu2 = mu2, sigma1= x, sigma2= sigma2, alpha = 0.05, beta = b) for x in s1]\n",
    "        axs[1,0].plot(s1, sample2, label = f'power: {1-b}')\n",
    "        axs[1,0].vlines(sigma1,0, max(sample2), colors='k', linestyles='dashed', lw=0.8)\n",
    "        axs[1,0].hlines(n_est,min(s1), max(s1), colors='k', linestyles='dashed', lw=0.8)\n",
    "        \n",
    "        sample3 = [sample_size_paired(mu1 = mu1, mu2 = mu2, sigma1= sigma1, sigma2 = x, alpha = 0.05, beta = b) for x in s2]\n",
    "        axs[1,1].plot(s2, sample3, label = f'power: {1-b}')\n",
    "        axs[1,1].vlines(sigma2,0, max(sample3), colors='k', linestyles='dashed', lw=0.8)\n",
    "        axs[1,1].hlines(n_est,min(s2), max(s2), colors='k', linestyles='dashed', lw=0.8)\n",
    "        \n",
    "        sample4 = [sample_size_paired(mu1 = mu1, mu2 = mu2, sigma1= sigma1, sigma2 = sigma2, rho = x, alpha = 0.05, beta = b) for x in rs]\n",
    "        axs[1,2].plot(rs, sample4, label = f'power: {1-b}')\n",
    "        axs[1,2].vlines(rho,0, max(sample4), colors='k', linestyles='dashed', lw=0.8)\n",
    "        axs[1,2].hlines(n_est,min(rs), max(rs), colors='k', linestyles='dashed', lw=0.8)\n",
    "        \n",
    "        axs[1,2].legend()\n",
    "        \n",
    "    plt.tight_layout()\n",
    "    plt.show()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "image/svg+xml": [
       "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\r\n",
       "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\r\n",
       "  \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\r\n",
       "<!-- Created with matplotlib (https://matplotlib.org/) -->\r\n",
       "<svg height=\"425.433437pt\" version=\"1.1\" viewBox=\"0 0 714.198348 425.433437\" width=\"714.198348pt\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\r\n",
       " <metadata>\r\n",
       "  <rdf:RDF xmlns:cc=\"http://creativecommons.org/ns#\" xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\">\r\n",
       "   <cc:Work>\r\n",
       "    <dc:type rdf:resource=\"http://purl.org/dc/dcmitype/StillImage\"/>\r\n",
       "    <dc:date>2021-01-08T10:10:14.505977</dc:date>\r\n",
       "    <dc:format>image/svg+xml</dc:format>\r\n",
       "    <dc:creator>\r\n",
       "     <cc:Agent>\r\n",
       "      <dc:title>Matplotlib v3.3.2, https://matplotlib.org/</dc:title>\r\n",
       "     </cc:Agent>\r\n",
       "    </dc:creator>\r\n",
       "   </cc:Work>\r\n",
       "  </rdf:RDF>\r\n",
       " </metadata>\r\n",
       " <defs>\r\n",
       "  <style type=\"text/css\">*{stroke-linecap:butt;stroke-linejoin:round;}</style>\r\n",
       " </defs>\r\n",
       " <g id=\"figure_1\">\r\n",
       "  <g id=\"patch_1\">\r\n",
       "   <path d=\"M 0 425.433437 \r\n",
       "L 714.198348 425.433437 \r\n",
       "L 714.198348 0 \r\n",
       "L 0 0 \r\n",
       "z\r\n",
       "\" style=\"fill:none;\"/>\r\n",
       "  </g>\r\n",
       "  <g id=\"axes_1\">\r\n",
       "   <g id=\"patch_2\">\r\n",
       "    <path d=\"M 46.965625 187.514117 \r\n",
       "L 232.260589 187.514117 \r\n",
       "L 232.260589 34.12875 \r\n",
       "L 46.965625 34.12875 \r\n",
       "z\r\n",
       "\" style=\"fill:#ffffff;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"matplotlib.axis_1\">\r\n",
       "    <g id=\"xtick_1\">\r\n",
       "     <g id=\"line2d_1\">\r\n",
       "      <defs>\r\n",
       "       <path d=\"M 0 0 \r\n",
       "L 0 3.5 \r\n",
       "\" id=\"mc4737e2393\" style=\"stroke:#000000;stroke-width:0.8;\"/>\r\n",
       "      </defs>\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"86.972492\" xlink:href=\"#mc4737e2393\" y=\"187.514117\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_1\">\r\n",
       "      <!-- 3.5 -->\r\n",
       "      <g transform=\"translate(79.02093 202.112554)scale(0.1 -0.1)\">\r\n",
       "       <defs>\r\n",
       "        <path d=\"M 40.578125 39.3125 \r\n",
       "Q 47.65625 37.796875 51.625 33 \r\n",
       "Q 55.609375 28.21875 55.609375 21.1875 \r\n",
       "Q 55.609375 10.40625 48.1875 4.484375 \r\n",
       "Q 40.765625 -1.421875 27.09375 -1.421875 \r\n",
       "Q 22.515625 -1.421875 17.65625 -0.515625 \r\n",
       "Q 12.796875 0.390625 7.625 2.203125 \r\n",
       "L 7.625 11.71875 \r\n",
       "Q 11.71875 9.328125 16.59375 8.109375 \r\n",
       "Q 21.484375 6.890625 26.8125 6.890625 \r\n",
       "Q 36.078125 6.890625 40.9375 10.546875 \r\n",
       "Q 45.796875 14.203125 45.796875 21.1875 \r\n",
       "Q 45.796875 27.640625 41.28125 31.265625 \r\n",
       "Q 36.765625 34.90625 28.71875 34.90625 \r\n",
       "L 20.21875 34.90625 \r\n",
       "L 20.21875 43.015625 \r\n",
       "L 29.109375 43.015625 \r\n",
       "Q 36.375 43.015625 40.234375 45.921875 \r\n",
       "Q 44.09375 48.828125 44.09375 54.296875 \r\n",
       "Q 44.09375 59.90625 40.109375 62.90625 \r\n",
       "Q 36.140625 65.921875 28.71875 65.921875 \r\n",
       "Q 24.65625 65.921875 20.015625 65.03125 \r\n",
       "Q 15.375 64.15625 9.8125 62.3125 \r\n",
       "L 9.8125 71.09375 \r\n",
       "Q 15.4375 72.65625 20.34375 73.4375 \r\n",
       "Q 25.25 74.21875 29.59375 74.21875 \r\n",
       "Q 40.828125 74.21875 47.359375 69.109375 \r\n",
       "Q 53.90625 64.015625 53.90625 55.328125 \r\n",
       "Q 53.90625 49.265625 50.4375 45.09375 \r\n",
       "Q 46.96875 40.921875 40.578125 39.3125 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-51\"/>\r\n",
       "        <path d=\"M 10.6875 12.40625 \r\n",
       "L 21 12.40625 \r\n",
       "L 21 0 \r\n",
       "L 10.6875 0 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-46\"/>\r\n",
       "        <path d=\"M 10.796875 72.90625 \r\n",
       "L 49.515625 72.90625 \r\n",
       "L 49.515625 64.59375 \r\n",
       "L 19.828125 64.59375 \r\n",
       "L 19.828125 46.734375 \r\n",
       "Q 21.96875 47.46875 24.109375 47.828125 \r\n",
       "Q 26.265625 48.1875 28.421875 48.1875 \r\n",
       "Q 40.625 48.1875 47.75 41.5 \r\n",
       "Q 54.890625 34.8125 54.890625 23.390625 \r\n",
       "Q 54.890625 11.625 47.5625 5.09375 \r\n",
       "Q 40.234375 -1.421875 26.90625 -1.421875 \r\n",
       "Q 22.3125 -1.421875 17.546875 -0.640625 \r\n",
       "Q 12.796875 0.140625 7.71875 1.703125 \r\n",
       "L 7.71875 11.625 \r\n",
       "Q 12.109375 9.234375 16.796875 8.0625 \r\n",
       "Q 21.484375 6.890625 26.703125 6.890625 \r\n",
       "Q 35.15625 6.890625 40.078125 11.328125 \r\n",
       "Q 45.015625 15.765625 45.015625 23.390625 \r\n",
       "Q 45.015625 31 40.078125 35.4375 \r\n",
       "Q 35.15625 39.890625 26.703125 39.890625 \r\n",
       "Q 22.75 39.890625 18.8125 39.015625 \r\n",
       "Q 14.890625 38.140625 10.796875 36.28125 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-53\"/>\r\n",
       "       </defs>\r\n",
       "       <use xlink:href=\"#DejaVuSans-51\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-46\"/>\r\n",
       "       <use x=\"95.410156\" xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"xtick_2\">\r\n",
       "     <g id=\"line2d_2\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"139.613107\" xlink:href=\"#mc4737e2393\" y=\"187.514117\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_2\">\r\n",
       "      <!-- 4.0 -->\r\n",
       "      <g transform=\"translate(131.661545 202.112554)scale(0.1 -0.1)\">\r\n",
       "       <defs>\r\n",
       "        <path d=\"M 37.796875 64.3125 \r\n",
       "L 12.890625 25.390625 \r\n",
       "L 37.796875 25.390625 \r\n",
       "z\r\n",
       "M 35.203125 72.90625 \r\n",
       "L 47.609375 72.90625 \r\n",
       "L 47.609375 25.390625 \r\n",
       "L 58.015625 25.390625 \r\n",
       "L 58.015625 17.1875 \r\n",
       "L 47.609375 17.1875 \r\n",
       "L 47.609375 0 \r\n",
       "L 37.796875 0 \r\n",
       "L 37.796875 17.1875 \r\n",
       "L 4.890625 17.1875 \r\n",
       "L 4.890625 26.703125 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-52\"/>\r\n",
       "        <path d=\"M 31.78125 66.40625 \r\n",
       "Q 24.171875 66.40625 20.328125 58.90625 \r\n",
       "Q 16.5 51.421875 16.5 36.375 \r\n",
       "Q 16.5 21.390625 20.328125 13.890625 \r\n",
       "Q 24.171875 6.390625 31.78125 6.390625 \r\n",
       "Q 39.453125 6.390625 43.28125 13.890625 \r\n",
       "Q 47.125 21.390625 47.125 36.375 \r\n",
       "Q 47.125 51.421875 43.28125 58.90625 \r\n",
       "Q 39.453125 66.40625 31.78125 66.40625 \r\n",
       "z\r\n",
       "M 31.78125 74.21875 \r\n",
       "Q 44.046875 74.21875 50.515625 64.515625 \r\n",
       "Q 56.984375 54.828125 56.984375 36.375 \r\n",
       "Q 56.984375 17.96875 50.515625 8.265625 \r\n",
       "Q 44.046875 -1.421875 31.78125 -1.421875 \r\n",
       "Q 19.53125 -1.421875 13.0625 8.265625 \r\n",
       "Q 6.59375 17.96875 6.59375 36.375 \r\n",
       "Q 6.59375 54.828125 13.0625 64.515625 \r\n",
       "Q 19.53125 74.21875 31.78125 74.21875 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-48\"/>\r\n",
       "       </defs>\r\n",
       "       <use xlink:href=\"#DejaVuSans-52\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-46\"/>\r\n",
       "       <use x=\"95.410156\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"xtick_3\">\r\n",
       "     <g id=\"line2d_3\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"192.253722\" xlink:href=\"#mc4737e2393\" y=\"187.514117\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_3\">\r\n",
       "      <!-- 4.5 -->\r\n",
       "      <g transform=\"translate(184.30216 202.112554)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-52\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-46\"/>\r\n",
       "       <use x=\"95.410156\" xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"text_4\">\r\n",
       "     <!-- Trung bình thay đổi nhóm chứng -->\r\n",
       "     <g transform=\"translate(58.411545 216.814117)scale(0.1 -0.1)\">\r\n",
       "      <defs>\r\n",
       "       <path d=\"M -0.296875 72.90625 \r\n",
       "L 61.375 72.90625 \r\n",
       "L 61.375 64.59375 \r\n",
       "L 35.5 64.59375 \r\n",
       "L 35.5 0 \r\n",
       "L 25.59375 0 \r\n",
       "L 25.59375 64.59375 \r\n",
       "L -0.296875 64.59375 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-84\"/>\r\n",
       "       <path d=\"M 41.109375 46.296875 \r\n",
       "Q 39.59375 47.171875 37.8125 47.578125 \r\n",
       "Q 36.03125 48 33.890625 48 \r\n",
       "Q 26.265625 48 22.1875 43.046875 \r\n",
       "Q 18.109375 38.09375 18.109375 28.8125 \r\n",
       "L 18.109375 0 \r\n",
       "L 9.078125 0 \r\n",
       "L 9.078125 54.6875 \r\n",
       "L 18.109375 54.6875 \r\n",
       "L 18.109375 46.1875 \r\n",
       "Q 20.953125 51.171875 25.484375 53.578125 \r\n",
       "Q 30.03125 56 36.53125 56 \r\n",
       "Q 37.453125 56 38.578125 55.875 \r\n",
       "Q 39.703125 55.765625 41.0625 55.515625 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-114\"/>\r\n",
       "       <path d=\"M 8.5 21.578125 \r\n",
       "L 8.5 54.6875 \r\n",
       "L 17.484375 54.6875 \r\n",
       "L 17.484375 21.921875 \r\n",
       "Q 17.484375 14.15625 20.5 10.265625 \r\n",
       "Q 23.53125 6.390625 29.59375 6.390625 \r\n",
       "Q 36.859375 6.390625 41.078125 11.03125 \r\n",
       "Q 45.3125 15.671875 45.3125 23.6875 \r\n",
       "L 45.3125 54.6875 \r\n",
       "L 54.296875 54.6875 \r\n",
       "L 54.296875 0 \r\n",
       "L 45.3125 0 \r\n",
       "L 45.3125 8.40625 \r\n",
       "Q 42.046875 3.421875 37.71875 1 \r\n",
       "Q 33.40625 -1.421875 27.6875 -1.421875 \r\n",
       "Q 18.265625 -1.421875 13.375 4.4375 \r\n",
       "Q 8.5 10.296875 8.5 21.578125 \r\n",
       "z\r\n",
       "M 31.109375 56 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-117\"/>\r\n",
       "       <path d=\"M 54.890625 33.015625 \r\n",
       "L 54.890625 0 \r\n",
       "L 45.90625 0 \r\n",
       "L 45.90625 32.71875 \r\n",
       "Q 45.90625 40.484375 42.875 44.328125 \r\n",
       "Q 39.84375 48.1875 33.796875 48.1875 \r\n",
       "Q 26.515625 48.1875 22.3125 43.546875 \r\n",
       "Q 18.109375 38.921875 18.109375 30.90625 \r\n",
       "L 18.109375 0 \r\n",
       "L 9.078125 0 \r\n",
       "L 9.078125 54.6875 \r\n",
       "L 18.109375 54.6875 \r\n",
       "L 18.109375 46.1875 \r\n",
       "Q 21.34375 51.125 25.703125 53.5625 \r\n",
       "Q 30.078125 56 35.796875 56 \r\n",
       "Q 45.21875 56 50.046875 50.171875 \r\n",
       "Q 54.890625 44.34375 54.890625 33.015625 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-110\"/>\r\n",
       "       <path d=\"M 45.40625 27.984375 \r\n",
       "Q 45.40625 37.75 41.375 43.109375 \r\n",
       "Q 37.359375 48.484375 30.078125 48.484375 \r\n",
       "Q 22.859375 48.484375 18.828125 43.109375 \r\n",
       "Q 14.796875 37.75 14.796875 27.984375 \r\n",
       "Q 14.796875 18.265625 18.828125 12.890625 \r\n",
       "Q 22.859375 7.515625 30.078125 7.515625 \r\n",
       "Q 37.359375 7.515625 41.375 12.890625 \r\n",
       "Q 45.40625 18.265625 45.40625 27.984375 \r\n",
       "z\r\n",
       "M 54.390625 6.78125 \r\n",
       "Q 54.390625 -7.171875 48.1875 -13.984375 \r\n",
       "Q 42 -20.796875 29.203125 -20.796875 \r\n",
       "Q 24.46875 -20.796875 20.265625 -20.09375 \r\n",
       "Q 16.0625 -19.390625 12.109375 -17.921875 \r\n",
       "L 12.109375 -9.1875 \r\n",
       "Q 16.0625 -11.328125 19.921875 -12.34375 \r\n",
       "Q 23.78125 -13.375 27.78125 -13.375 \r\n",
       "Q 36.625 -13.375 41.015625 -8.765625 \r\n",
       "Q 45.40625 -4.15625 45.40625 5.171875 \r\n",
       "L 45.40625 9.625 \r\n",
       "Q 42.625 4.78125 38.28125 2.390625 \r\n",
       "Q 33.9375 0 27.875 0 \r\n",
       "Q 17.828125 0 11.671875 7.65625 \r\n",
       "Q 5.515625 15.328125 5.515625 27.984375 \r\n",
       "Q 5.515625 40.671875 11.671875 48.328125 \r\n",
       "Q 17.828125 56 27.875 56 \r\n",
       "Q 33.9375 56 38.28125 53.609375 \r\n",
       "Q 42.625 51.21875 45.40625 46.390625 \r\n",
       "L 45.40625 54.6875 \r\n",
       "L 54.390625 54.6875 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-103\"/>\r\n",
       "       <path id=\"DejaVuSans-32\"/>\r\n",
       "       <path d=\"M 48.6875 27.296875 \r\n",
       "Q 48.6875 37.203125 44.609375 42.84375 \r\n",
       "Q 40.53125 48.484375 33.40625 48.484375 \r\n",
       "Q 26.265625 48.484375 22.1875 42.84375 \r\n",
       "Q 18.109375 37.203125 18.109375 27.296875 \r\n",
       "Q 18.109375 17.390625 22.1875 11.75 \r\n",
       "Q 26.265625 6.109375 33.40625 6.109375 \r\n",
       "Q 40.53125 6.109375 44.609375 11.75 \r\n",
       "Q 48.6875 17.390625 48.6875 27.296875 \r\n",
       "z\r\n",
       "M 18.109375 46.390625 \r\n",
       "Q 20.953125 51.265625 25.265625 53.625 \r\n",
       "Q 29.59375 56 35.59375 56 \r\n",
       "Q 45.5625 56 51.78125 48.09375 \r\n",
       "Q 58.015625 40.1875 58.015625 27.296875 \r\n",
       "Q 58.015625 14.40625 51.78125 6.484375 \r\n",
       "Q 45.5625 -1.421875 35.59375 -1.421875 \r\n",
       "Q 29.59375 -1.421875 25.265625 0.953125 \r\n",
       "Q 20.953125 3.328125 18.109375 8.203125 \r\n",
       "L 18.109375 0 \r\n",
       "L 9.078125 0 \r\n",
       "L 9.078125 75.984375 \r\n",
       "L 18.109375 75.984375 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-98\"/>\r\n",
       "       <path d=\"M 6.84375 79.984375 \r\n",
       "L 20.609375 61.71875 \r\n",
       "L 13.140625 61.71875 \r\n",
       "L -2.78125 79.984375 \r\n",
       "z\r\n",
       "M 9.421875 54.6875 \r\n",
       "L 18.40625 54.6875 \r\n",
       "L 18.40625 0 \r\n",
       "L 9.421875 0 \r\n",
       "z\r\n",
       "M 13.921875 56 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-236\"/>\r\n",
       "       <path d=\"M 54.890625 33.015625 \r\n",
       "L 54.890625 0 \r\n",
       "L 45.90625 0 \r\n",
       "L 45.90625 32.71875 \r\n",
       "Q 45.90625 40.484375 42.875 44.328125 \r\n",
       "Q 39.84375 48.1875 33.796875 48.1875 \r\n",
       "Q 26.515625 48.1875 22.3125 43.546875 \r\n",
       "Q 18.109375 38.921875 18.109375 30.90625 \r\n",
       "L 18.109375 0 \r\n",
       "L 9.078125 0 \r\n",
       "L 9.078125 75.984375 \r\n",
       "L 18.109375 75.984375 \r\n",
       "L 18.109375 46.1875 \r\n",
       "Q 21.34375 51.125 25.703125 53.5625 \r\n",
       "Q 30.078125 56 35.796875 56 \r\n",
       "Q 45.21875 56 50.046875 50.171875 \r\n",
       "Q 54.890625 44.34375 54.890625 33.015625 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-104\"/>\r\n",
       "       <path d=\"M 18.3125 70.21875 \r\n",
       "L 18.3125 54.6875 \r\n",
       "L 36.8125 54.6875 \r\n",
       "L 36.8125 47.703125 \r\n",
       "L 18.3125 47.703125 \r\n",
       "L 18.3125 18.015625 \r\n",
       "Q 18.3125 11.328125 20.140625 9.421875 \r\n",
       "Q 21.96875 7.515625 27.59375 7.515625 \r\n",
       "L 36.8125 7.515625 \r\n",
       "L 36.8125 0 \r\n",
       "L 27.59375 0 \r\n",
       "Q 17.1875 0 13.234375 3.875 \r\n",
       "Q 9.28125 7.765625 9.28125 18.015625 \r\n",
       "L 9.28125 47.703125 \r\n",
       "L 2.6875 47.703125 \r\n",
       "L 2.6875 54.6875 \r\n",
       "L 9.28125 54.6875 \r\n",
       "L 9.28125 70.21875 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-116\"/>\r\n",
       "       <path d=\"M 34.28125 27.484375 \r\n",
       "Q 23.390625 27.484375 19.1875 25 \r\n",
       "Q 14.984375 22.515625 14.984375 16.5 \r\n",
       "Q 14.984375 11.71875 18.140625 8.90625 \r\n",
       "Q 21.296875 6.109375 26.703125 6.109375 \r\n",
       "Q 34.1875 6.109375 38.703125 11.40625 \r\n",
       "Q 43.21875 16.703125 43.21875 25.484375 \r\n",
       "L 43.21875 27.484375 \r\n",
       "z\r\n",
       "M 52.203125 31.203125 \r\n",
       "L 52.203125 0 \r\n",
       "L 43.21875 0 \r\n",
       "L 43.21875 8.296875 \r\n",
       "Q 40.140625 3.328125 35.546875 0.953125 \r\n",
       "Q 30.953125 -1.421875 24.3125 -1.421875 \r\n",
       "Q 15.921875 -1.421875 10.953125 3.296875 \r\n",
       "Q 6 8.015625 6 15.921875 \r\n",
       "Q 6 25.140625 12.171875 29.828125 \r\n",
       "Q 18.359375 34.515625 30.609375 34.515625 \r\n",
       "L 43.21875 34.515625 \r\n",
       "L 43.21875 35.40625 \r\n",
       "Q 43.21875 41.609375 39.140625 45 \r\n",
       "Q 35.0625 48.390625 27.6875 48.390625 \r\n",
       "Q 23 48.390625 18.546875 47.265625 \r\n",
       "Q 14.109375 46.140625 10.015625 43.890625 \r\n",
       "L 10.015625 52.203125 \r\n",
       "Q 14.9375 54.109375 19.578125 55.046875 \r\n",
       "Q 24.21875 56 28.609375 56 \r\n",
       "Q 40.484375 56 46.34375 49.84375 \r\n",
       "Q 52.203125 43.703125 52.203125 31.203125 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-97\"/>\r\n",
       "       <path d=\"M 32.171875 -5.078125 \r\n",
       "Q 28.375 -14.84375 24.75 -17.8125 \r\n",
       "Q 21.140625 -20.796875 15.09375 -20.796875 \r\n",
       "L 7.90625 -20.796875 \r\n",
       "L 7.90625 -13.28125 \r\n",
       "L 13.1875 -13.28125 \r\n",
       "Q 16.890625 -13.28125 18.9375 -11.515625 \r\n",
       "Q 21 -9.765625 23.484375 -3.21875 \r\n",
       "L 25.09375 0.875 \r\n",
       "L 2.984375 54.6875 \r\n",
       "L 12.5 54.6875 \r\n",
       "L 29.59375 11.921875 \r\n",
       "L 46.6875 54.6875 \r\n",
       "L 56.203125 54.6875 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-121\"/>\r\n",
       "       <path d=\"M 45.40625 46.390625 \r\n",
       "L 45.40625 62.703125 \r\n",
       "L 29.5 62.703125 \r\n",
       "L 29.5 68.796875 \r\n",
       "L 45.40625 68.796875 \r\n",
       "L 45.40625 75.984375 \r\n",
       "L 54.390625 75.984375 \r\n",
       "L 54.390625 68.796875 \r\n",
       "L 61.921875 68.796875 \r\n",
       "L 61.921875 62.703125 \r\n",
       "L 54.390625 62.703125 \r\n",
       "L 54.390625 0 \r\n",
       "L 45.40625 0 \r\n",
       "L 45.40625 8.203125 \r\n",
       "Q 42.578125 3.328125 38.25 0.953125 \r\n",
       "Q 33.9375 -1.421875 27.875 -1.421875 \r\n",
       "Q 17.96875 -1.421875 11.734375 6.484375 \r\n",
       "Q 5.515625 14.40625 5.515625 27.296875 \r\n",
       "Q 5.515625 40.1875 11.734375 48.09375 \r\n",
       "Q 17.96875 56 27.875 56 \r\n",
       "Q 33.9375 56 38.25 53.625 \r\n",
       "Q 42.578125 51.265625 45.40625 46.390625 \r\n",
       "z\r\n",
       "M 14.796875 27.296875 \r\n",
       "Q 14.796875 17.390625 18.875 11.75 \r\n",
       "Q 22.953125 6.109375 30.078125 6.109375 \r\n",
       "Q 37.203125 6.109375 41.296875 11.75 \r\n",
       "Q 45.40625 17.390625 45.40625 27.296875 \r\n",
       "Q 45.40625 37.203125 41.296875 42.84375 \r\n",
       "Q 37.203125 48.484375 30.078125 48.484375 \r\n",
       "Q 22.953125 48.484375 18.875 42.84375 \r\n",
       "Q 14.796875 37.203125 14.796875 27.296875 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-273\"/>\r\n",
       "       <path d=\"M 37.359375 83.734375 \r\n",
       "Q 42.828125 86.21875 47.953125 86.21875 \r\n",
       "Q 53.03125 86.21875 56.125 84.140625 \r\n",
       "Q 59.234375 82.078125 59.234375 78.796875 \r\n",
       "Q 59.234375 75.828125 54.9375 72.65625 \r\n",
       "L 52.78125 71.09375 \r\n",
       "Q 51.078125 69.8125 50.875 69.375 \r\n",
       "Q 50.53125 68.59375 50.53125 67.03125 \r\n",
       "L 44.734375 67.03125 \r\n",
       "L 44.734375 67.625 \r\n",
       "Q 44.734375 69.578125 45.453125 70.890625 \r\n",
       "Q 46.1875 72.21875 48.6875 74.015625 \r\n",
       "L 50.875 75.671875 \r\n",
       "Q 53.125 77.34375 53.125 79.296875 \r\n",
       "Q 53.125 80.3125 51.609375 81.1875 \r\n",
       "Q 50.09375 82.078125 46.625 82.078125 \r\n",
       "Q 42.234375 82.078125 37.359375 79.53125 \r\n",
       "z\r\n",
       "M 25.984375 74.609375 \r\n",
       "L 35.15625 74.609375 \r\n",
       "L 45.453125 61.625 \r\n",
       "L 38.671875 61.625 \r\n",
       "L 30.5625 70.3125 \r\n",
       "L 22.46875 61.625 \r\n",
       "L 15.671875 61.625 \r\n",
       "z\r\n",
       "M 30.609375 48.390625 \r\n",
       "Q 23.390625 48.390625 19.1875 42.75 \r\n",
       "Q 14.984375 37.109375 14.984375 27.296875 \r\n",
       "Q 14.984375 17.484375 19.15625 11.84375 \r\n",
       "Q 23.34375 6.203125 30.609375 6.203125 \r\n",
       "Q 37.796875 6.203125 41.984375 11.859375 \r\n",
       "Q 46.1875 17.53125 46.1875 27.296875 \r\n",
       "Q 46.1875 37.015625 41.984375 42.703125 \r\n",
       "Q 37.796875 48.390625 30.609375 48.390625 \r\n",
       "z\r\n",
       "M 30.609375 56 \r\n",
       "Q 42.328125 56 49.015625 48.375 \r\n",
       "Q 55.71875 40.765625 55.71875 27.296875 \r\n",
       "Q 55.71875 13.875 49.015625 6.21875 \r\n",
       "Q 42.328125 -1.421875 30.609375 -1.421875 \r\n",
       "Q 18.84375 -1.421875 12.171875 6.21875 \r\n",
       "Q 5.515625 13.875 5.515625 27.296875 \r\n",
       "Q 5.515625 40.765625 12.171875 48.375 \r\n",
       "Q 18.84375 56 30.609375 56 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-7893\"/>\r\n",
       "       <path d=\"M 9.421875 54.6875 \r\n",
       "L 18.40625 54.6875 \r\n",
       "L 18.40625 0 \r\n",
       "L 9.421875 0 \r\n",
       "z\r\n",
       "M 9.421875 75.984375 \r\n",
       "L 18.40625 75.984375 \r\n",
       "L 18.40625 64.59375 \r\n",
       "L 9.421875 64.59375 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-105\"/>\r\n",
       "       <path d=\"M 30.609375 48.390625 \r\n",
       "Q 23.390625 48.390625 19.1875 42.75 \r\n",
       "Q 14.984375 37.109375 14.984375 27.296875 \r\n",
       "Q 14.984375 17.484375 19.15625 11.84375 \r\n",
       "Q 23.34375 6.203125 30.609375 6.203125 \r\n",
       "Q 37.796875 6.203125 41.984375 11.859375 \r\n",
       "Q 46.1875 17.53125 46.1875 27.296875 \r\n",
       "Q 46.1875 37.015625 41.984375 42.703125 \r\n",
       "Q 37.796875 48.390625 30.609375 48.390625 \r\n",
       "z\r\n",
       "M 30.609375 56 \r\n",
       "Q 42.328125 56 49.015625 48.375 \r\n",
       "Q 55.71875 40.765625 55.71875 27.296875 \r\n",
       "Q 55.71875 13.875 49.015625 6.21875 \r\n",
       "Q 42.328125 -1.421875 30.609375 -1.421875 \r\n",
       "Q 18.84375 -1.421875 12.171875 6.21875 \r\n",
       "Q 5.515625 13.875 5.515625 27.296875 \r\n",
       "Q 5.515625 40.765625 12.171875 48.375 \r\n",
       "Q 18.84375 56 30.609375 56 \r\n",
       "z\r\n",
       "M 37.40625 79.984375 \r\n",
       "L 47.125 79.984375 \r\n",
       "L 31.203125 61.625 \r\n",
       "L 23.734375 61.625 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-243\"/>\r\n",
       "       <path d=\"M 52 44.1875 \r\n",
       "Q 55.375 50.25 60.0625 53.125 \r\n",
       "Q 64.75 56 71.09375 56 \r\n",
       "Q 79.640625 56 84.28125 50.015625 \r\n",
       "Q 88.921875 44.046875 88.921875 33.015625 \r\n",
       "L 88.921875 0 \r\n",
       "L 79.890625 0 \r\n",
       "L 79.890625 32.71875 \r\n",
       "Q 79.890625 40.578125 77.09375 44.375 \r\n",
       "Q 74.3125 48.1875 68.609375 48.1875 \r\n",
       "Q 61.625 48.1875 57.5625 43.546875 \r\n",
       "Q 53.515625 38.921875 53.515625 30.90625 \r\n",
       "L 53.515625 0 \r\n",
       "L 44.484375 0 \r\n",
       "L 44.484375 32.71875 \r\n",
       "Q 44.484375 40.625 41.703125 44.40625 \r\n",
       "Q 38.921875 48.1875 33.109375 48.1875 \r\n",
       "Q 26.21875 48.1875 22.15625 43.53125 \r\n",
       "Q 18.109375 38.875 18.109375 30.90625 \r\n",
       "L 18.109375 0 \r\n",
       "L 9.078125 0 \r\n",
       "L 9.078125 54.6875 \r\n",
       "L 18.109375 54.6875 \r\n",
       "L 18.109375 46.1875 \r\n",
       "Q 21.1875 51.21875 25.484375 53.609375 \r\n",
       "Q 29.78125 56 35.6875 56 \r\n",
       "Q 41.65625 56 45.828125 52.96875 \r\n",
       "Q 50 49.953125 52 44.1875 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-109\"/>\r\n",
       "       <path d=\"M 48.78125 52.59375 \r\n",
       "L 48.78125 44.1875 \r\n",
       "Q 44.96875 46.296875 41.140625 47.34375 \r\n",
       "Q 37.3125 48.390625 33.40625 48.390625 \r\n",
       "Q 24.65625 48.390625 19.8125 42.84375 \r\n",
       "Q 14.984375 37.3125 14.984375 27.296875 \r\n",
       "Q 14.984375 17.28125 19.8125 11.734375 \r\n",
       "Q 24.65625 6.203125 33.40625 6.203125 \r\n",
       "Q 37.3125 6.203125 41.140625 7.25 \r\n",
       "Q 44.96875 8.296875 48.78125 10.40625 \r\n",
       "L 48.78125 2.09375 \r\n",
       "Q 45.015625 0.34375 40.984375 -0.53125 \r\n",
       "Q 36.96875 -1.421875 32.421875 -1.421875 \r\n",
       "Q 20.0625 -1.421875 12.78125 6.34375 \r\n",
       "Q 5.515625 14.109375 5.515625 27.296875 \r\n",
       "Q 5.515625 40.671875 12.859375 48.328125 \r\n",
       "Q 20.21875 56 33.015625 56 \r\n",
       "Q 37.15625 56 41.109375 55.140625 \r\n",
       "Q 45.0625 54.296875 48.78125 52.59375 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-99\"/>\r\n",
       "       <path d=\"M 37.796875 79.984375 \r\n",
       "L 47.515625 79.984375 \r\n",
       "L 31.59375 61.625 \r\n",
       "L 24.125 61.625 \r\n",
       "z\r\n",
       "M 48.34375 48.53125 \r\n",
       "L 48.34375 54.34375 \r\n",
       "Q 51.3125 52.140625 53.453125 51.09375 \r\n",
       "Q 55.609375 50.046875 57.125 50.046875 \r\n",
       "Q 59.375 50.046875 60.5 51.390625 \r\n",
       "Q 61.625 52.734375 61.625 55.359375 \r\n",
       "Q 61.625 56.921875 61.25 58.4375 \r\n",
       "Q 60.890625 59.953125 60.15625 61.46875 \r\n",
       "L 66.65625 61.46875 \r\n",
       "Q 67.140625 59.609375 67.375 57.953125 \r\n",
       "Q 67.625 56.296875 67.625 54.828125 \r\n",
       "Q 67.625 48.875 65.5 46.0625 \r\n",
       "Q 63.375 43.25 58.84375 43.25 \r\n",
       "Q 56.5 43.25 53.9375 44.546875 \r\n",
       "Q 51.375 45.84375 48.34375 48.53125 \r\n",
       "z\r\n",
       "M 8.59375 21.578125 \r\n",
       "L 8.59375 54.6875 \r\n",
       "L 17.578125 54.6875 \r\n",
       "L 17.578125 21.921875 \r\n",
       "Q 17.578125 14.15625 20.609375 10.265625 \r\n",
       "Q 23.640625 6.390625 29.6875 6.390625 \r\n",
       "Q 36.96875 6.390625 41.1875 11.03125 \r\n",
       "Q 45.40625 15.671875 45.40625 23.6875 \r\n",
       "L 45.40625 54.6875 \r\n",
       "L 54.390625 54.6875 \r\n",
       "L 54.390625 0 \r\n",
       "L 45.40625 0 \r\n",
       "L 45.40625 8.40625 \r\n",
       "Q 42.140625 3.421875 37.8125 1 \r\n",
       "Q 33.5 -1.421875 27.78125 -1.421875 \r\n",
       "Q 18.359375 -1.421875 13.46875 4.4375 \r\n",
       "Q 8.59375 10.296875 8.59375 21.578125 \r\n",
       "z\r\n",
       "M 31.203125 56 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-7913\"/>\r\n",
       "      </defs>\r\n",
       "      <use xlink:href=\"#DejaVuSans-84\"/>\r\n",
       "      <use x=\"46.333984\" xlink:href=\"#DejaVuSans-114\"/>\r\n",
       "      <use x=\"87.447266\" xlink:href=\"#DejaVuSans-117\"/>\r\n",
       "      <use x=\"150.826172\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"214.205078\" xlink:href=\"#DejaVuSans-103\"/>\r\n",
       "      <use x=\"277.681641\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"309.46875\" xlink:href=\"#DejaVuSans-98\"/>\r\n",
       "      <use x=\"372.945312\" xlink:href=\"#DejaVuSans-236\"/>\r\n",
       "      <use x=\"400.728516\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"464.107422\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "      <use x=\"527.486328\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"559.273438\" xlink:href=\"#DejaVuSans-116\"/>\r\n",
       "      <use x=\"598.482422\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "      <use x=\"661.861328\" xlink:href=\"#DejaVuSans-97\"/>\r\n",
       "      <use x=\"723.140625\" xlink:href=\"#DejaVuSans-121\"/>\r\n",
       "      <use x=\"782.320312\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"814.107422\" xlink:href=\"#DejaVuSans-273\"/>\r\n",
       "      <use x=\"877.583984\" xlink:href=\"#DejaVuSans-7893\"/>\r\n",
       "      <use x=\"938.765625\" xlink:href=\"#DejaVuSans-105\"/>\r\n",
       "      <use x=\"966.548828\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"998.335938\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"1061.714844\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "      <use x=\"1125.09375\" xlink:href=\"#DejaVuSans-243\"/>\r\n",
       "      <use x=\"1186.275391\" xlink:href=\"#DejaVuSans-109\"/>\r\n",
       "      <use x=\"1283.6875\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"1315.474609\" xlink:href=\"#DejaVuSans-99\"/>\r\n",
       "      <use x=\"1370.455078\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "      <use x=\"1433.833984\" xlink:href=\"#DejaVuSans-7913\"/>\r\n",
       "      <use x=\"1497.212891\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"1560.591797\" xlink:href=\"#DejaVuSans-103\"/>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "   </g>\r\n",
       "   <g id=\"matplotlib.axis_2\">\r\n",
       "    <g id=\"ytick_1\">\r\n",
       "     <g id=\"line2d_4\">\r\n",
       "      <defs>\r\n",
       "       <path d=\"M 0 0 \r\n",
       "L -3.5 0 \r\n",
       "\" id=\"m6a8762d578\" style=\"stroke:#000000;stroke-width:0.8;\"/>\r\n",
       "      </defs>\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"46.965625\" xlink:href=\"#m6a8762d578\" y=\"180.542055\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_5\">\r\n",
       "      <!-- 0 -->\r\n",
       "      <g transform=\"translate(33.603125 184.341273)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_2\">\r\n",
       "     <g id=\"line2d_5\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"46.965625\" xlink:href=\"#m6a8762d578\" y=\"155.786931\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_6\">\r\n",
       "      <!-- 25 -->\r\n",
       "      <g transform=\"translate(27.240625 159.58615)scale(0.1 -0.1)\">\r\n",
       "       <defs>\r\n",
       "        <path d=\"M 19.1875 8.296875 \r\n",
       "L 53.609375 8.296875 \r\n",
       "L 53.609375 0 \r\n",
       "L 7.328125 0 \r\n",
       "L 7.328125 8.296875 \r\n",
       "Q 12.9375 14.109375 22.625 23.890625 \r\n",
       "Q 32.328125 33.6875 34.8125 36.53125 \r\n",
       "Q 39.546875 41.84375 41.421875 45.53125 \r\n",
       "Q 43.3125 49.21875 43.3125 52.78125 \r\n",
       "Q 43.3125 58.59375 39.234375 62.25 \r\n",
       "Q 35.15625 65.921875 28.609375 65.921875 \r\n",
       "Q 23.96875 65.921875 18.8125 64.3125 \r\n",
       "Q 13.671875 62.703125 7.8125 59.421875 \r\n",
       "L 7.8125 69.390625 \r\n",
       "Q 13.765625 71.78125 18.9375 73 \r\n",
       "Q 24.125 74.21875 28.421875 74.21875 \r\n",
       "Q 39.75 74.21875 46.484375 68.546875 \r\n",
       "Q 53.21875 62.890625 53.21875 53.421875 \r\n",
       "Q 53.21875 48.921875 51.53125 44.890625 \r\n",
       "Q 49.859375 40.875 45.40625 35.40625 \r\n",
       "Q 44.1875 33.984375 37.640625 27.21875 \r\n",
       "Q 31.109375 20.453125 19.1875 8.296875 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-50\"/>\r\n",
       "       </defs>\r\n",
       "       <use xlink:href=\"#DejaVuSans-50\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_3\">\r\n",
       "     <g id=\"line2d_6\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"46.965625\" xlink:href=\"#m6a8762d578\" y=\"131.031808\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_7\">\r\n",
       "      <!-- 50 -->\r\n",
       "      <g transform=\"translate(27.240625 134.831026)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_4\">\r\n",
       "     <g id=\"line2d_7\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"46.965625\" xlink:href=\"#m6a8762d578\" y=\"106.276684\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_8\">\r\n",
       "      <!-- 75 -->\r\n",
       "      <g transform=\"translate(27.240625 110.075903)scale(0.1 -0.1)\">\r\n",
       "       <defs>\r\n",
       "        <path d=\"M 8.203125 72.90625 \r\n",
       "L 55.078125 72.90625 \r\n",
       "L 55.078125 68.703125 \r\n",
       "L 28.609375 0 \r\n",
       "L 18.3125 0 \r\n",
       "L 43.21875 64.59375 \r\n",
       "L 8.203125 64.59375 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-55\"/>\r\n",
       "       </defs>\r\n",
       "       <use xlink:href=\"#DejaVuSans-55\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_5\">\r\n",
       "     <g id=\"line2d_8\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"46.965625\" xlink:href=\"#m6a8762d578\" y=\"81.521561\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_9\">\r\n",
       "      <!-- 100 -->\r\n",
       "      <g transform=\"translate(20.878125 85.320779)scale(0.1 -0.1)\">\r\n",
       "       <defs>\r\n",
       "        <path d=\"M 12.40625 8.296875 \r\n",
       "L 28.515625 8.296875 \r\n",
       "L 28.515625 63.921875 \r\n",
       "L 10.984375 60.40625 \r\n",
       "L 10.984375 69.390625 \r\n",
       "L 28.421875 72.90625 \r\n",
       "L 38.28125 72.90625 \r\n",
       "L 38.28125 8.296875 \r\n",
       "L 54.390625 8.296875 \r\n",
       "L 54.390625 0 \r\n",
       "L 12.40625 0 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-49\"/>\r\n",
       "       </defs>\r\n",
       "       <use xlink:href=\"#DejaVuSans-49\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "       <use x=\"127.246094\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_6\">\r\n",
       "     <g id=\"line2d_9\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"46.965625\" xlink:href=\"#m6a8762d578\" y=\"56.766437\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_10\">\r\n",
       "      <!-- 125 -->\r\n",
       "      <g transform=\"translate(20.878125 60.565656)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-49\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-50\"/>\r\n",
       "       <use x=\"127.246094\" xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"text_11\">\r\n",
       "     <!-- Cỡ mẫu ước tính -->\r\n",
       "     <g transform=\"translate(14.798437 151.90659)rotate(-90)scale(0.1 -0.1)\">\r\n",
       "      <defs>\r\n",
       "       <path d=\"M 64.40625 67.28125 \r\n",
       "L 64.40625 56.890625 \r\n",
       "Q 59.421875 61.53125 53.78125 63.8125 \r\n",
       "Q 48.140625 66.109375 41.796875 66.109375 \r\n",
       "Q 29.296875 66.109375 22.65625 58.46875 \r\n",
       "Q 16.015625 50.828125 16.015625 36.375 \r\n",
       "Q 16.015625 21.96875 22.65625 14.328125 \r\n",
       "Q 29.296875 6.6875 41.796875 6.6875 \r\n",
       "Q 48.140625 6.6875 53.78125 8.984375 \r\n",
       "Q 59.421875 11.28125 64.40625 15.921875 \r\n",
       "L 64.40625 5.609375 \r\n",
       "Q 59.234375 2.09375 53.4375 0.328125 \r\n",
       "Q 47.65625 -1.421875 41.21875 -1.421875 \r\n",
       "Q 24.65625 -1.421875 15.125 8.703125 \r\n",
       "Q 5.609375 18.84375 5.609375 36.375 \r\n",
       "Q 5.609375 53.953125 15.125 64.078125 \r\n",
       "Q 24.65625 74.21875 41.21875 74.21875 \r\n",
       "Q 47.75 74.21875 53.53125 72.484375 \r\n",
       "Q 59.328125 70.75 64.40625 67.28125 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-67\"/>\r\n",
       "       <path d=\"M 30.421875 66.890625 \r\n",
       "L 27.640625 69.578125 \r\n",
       "Q 26.5625 70.5625 25.75 71.015625 \r\n",
       "Q 24.953125 71.484375 24.3125 71.484375 \r\n",
       "Q 22.46875 71.484375 21.578125 69.703125 \r\n",
       "Q 20.703125 67.921875 20.609375 63.921875 \r\n",
       "L 14.5 63.921875 \r\n",
       "Q 14.59375 70.515625 17.078125 74.09375 \r\n",
       "Q 19.578125 77.6875 24.03125 77.6875 \r\n",
       "Q 25.875 77.6875 27.4375 77 \r\n",
       "Q 29 76.3125 30.8125 74.703125 \r\n",
       "L 33.59375 72.015625 \r\n",
       "Q 34.671875 71.046875 35.46875 70.578125 \r\n",
       "Q 36.28125 70.125 36.921875 70.125 \r\n",
       "Q 38.765625 70.125 39.640625 71.90625 \r\n",
       "Q 40.53125 73.6875 40.625 77.6875 \r\n",
       "L 46.734375 77.6875 \r\n",
       "Q 46.625 71.09375 44.140625 67.5 \r\n",
       "Q 41.65625 63.921875 37.203125 63.921875 \r\n",
       "Q 35.359375 63.921875 33.796875 64.59375 \r\n",
       "Q 32.234375 65.28125 30.421875 66.890625 \r\n",
       "z\r\n",
       "M 41.015625 48.53125 \r\n",
       "L 41.015625 54.34375 \r\n",
       "Q 44 52.140625 46.140625 51.09375 \r\n",
       "Q 48.296875 50.046875 49.8125 50.046875 \r\n",
       "Q 52.046875 50.046875 53.171875 51.390625 \r\n",
       "Q 54.296875 52.734375 54.296875 55.359375 \r\n",
       "Q 54.296875 56.921875 53.921875 58.4375 \r\n",
       "Q 53.5625 59.953125 52.828125 61.46875 \r\n",
       "L 59.328125 61.46875 \r\n",
       "Q 59.8125 59.609375 60.046875 57.953125 \r\n",
       "Q 60.296875 56.296875 60.296875 54.828125 \r\n",
       "Q 60.296875 48.875 58.171875 46.0625 \r\n",
       "Q 56.0625 43.25 51.515625 43.25 \r\n",
       "Q 49.171875 43.25 46.609375 44.546875 \r\n",
       "Q 44.046875 45.84375 41.015625 48.53125 \r\n",
       "z\r\n",
       "M 30.859375 48.390625 \r\n",
       "Q 23.640625 48.390625 19.4375 42.75 \r\n",
       "Q 15.234375 37.109375 15.234375 27.296875 \r\n",
       "Q 15.234375 17.484375 19.40625 11.84375 \r\n",
       "Q 23.578125 6.203125 30.859375 6.203125 \r\n",
       "Q 38.03125 6.203125 42.234375 11.859375 \r\n",
       "Q 46.4375 17.53125 46.4375 27.296875 \r\n",
       "Q 46.4375 37.015625 42.234375 42.703125 \r\n",
       "Q 38.03125 48.390625 30.859375 48.390625 \r\n",
       "z\r\n",
       "M 30.859375 56 \r\n",
       "Q 42.578125 56 49.265625 48.375 \r\n",
       "Q 55.953125 40.765625 55.953125 27.296875 \r\n",
       "Q 55.953125 13.875 49.265625 6.21875 \r\n",
       "Q 42.578125 -1.421875 30.859375 -1.421875 \r\n",
       "Q 19.09375 -1.421875 12.421875 6.21875 \r\n",
       "Q 5.765625 13.875 5.765625 27.296875 \r\n",
       "Q 5.765625 40.765625 12.421875 48.375 \r\n",
       "Q 19.09375 56 30.859375 56 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-7905\"/>\r\n",
       "       <path d=\"M 24.421875 74.609375 \r\n",
       "L 33.59375 74.609375 \r\n",
       "L 43.890625 61.625 \r\n",
       "L 37.109375 61.625 \r\n",
       "L 29 70.3125 \r\n",
       "L 20.90625 61.625 \r\n",
       "L 14.109375 61.625 \r\n",
       "z\r\n",
       "M 29 78.90625 \r\n",
       "L 26.21875 80.515625 \r\n",
       "Q 25 81.203125 24.234375 81.46875 \r\n",
       "Q 23.484375 81.734375 22.90625 81.734375 \r\n",
       "Q 21.140625 81.734375 20.15625 80.515625 \r\n",
       "Q 19.1875 79.296875 19.1875 77.109375 \r\n",
       "L 19.1875 76.8125 \r\n",
       "L 13.09375 76.8125 \r\n",
       "Q 13.09375 81.734375 15.59375 84.609375 \r\n",
       "Q 18.109375 87.5 22.3125 87.5 \r\n",
       "Q 24.078125 87.5 25.5625 87.109375 \r\n",
       "Q 27.046875 86.71875 29.390625 85.40625 \r\n",
       "L 32.171875 83.9375 \r\n",
       "Q 33.296875 83.296875 34.125 83 \r\n",
       "Q 34.96875 82.71875 35.6875 82.71875 \r\n",
       "Q 37.25 82.71875 38.21875 83.953125 \r\n",
       "Q 39.203125 85.203125 39.203125 87.203125 \r\n",
       "L 39.203125 87.5 \r\n",
       "L 45.3125 87.5 \r\n",
       "Q 45.21875 82.625 42.703125 79.71875 \r\n",
       "Q 40.1875 76.8125 36.078125 76.8125 \r\n",
       "Q 34.421875 76.8125 32.984375 77.203125 \r\n",
       "Q 31.546875 77.59375 29 78.90625 \r\n",
       "z\r\n",
       "M 34.28125 27.484375 \r\n",
       "Q 23.390625 27.484375 19.1875 25 \r\n",
       "Q 14.984375 22.515625 14.984375 16.5 \r\n",
       "Q 14.984375 11.71875 18.140625 8.90625 \r\n",
       "Q 21.296875 6.109375 26.703125 6.109375 \r\n",
       "Q 34.1875 6.109375 38.703125 11.40625 \r\n",
       "Q 43.21875 16.703125 43.21875 25.484375 \r\n",
       "L 43.21875 27.484375 \r\n",
       "z\r\n",
       "M 52.203125 31.203125 \r\n",
       "L 52.203125 0 \r\n",
       "L 43.21875 0 \r\n",
       "L 43.21875 8.296875 \r\n",
       "Q 40.140625 3.328125 35.546875 0.953125 \r\n",
       "Q 30.953125 -1.421875 24.3125 -1.421875 \r\n",
       "Q 15.921875 -1.421875 10.953125 3.296875 \r\n",
       "Q 6 8.015625 6 15.921875 \r\n",
       "Q 6 25.140625 12.171875 29.828125 \r\n",
       "Q 18.359375 34.515625 30.609375 34.515625 \r\n",
       "L 43.21875 34.515625 \r\n",
       "L 43.21875 35.40625 \r\n",
       "Q 43.21875 41.609375 39.140625 45 \r\n",
       "Q 35.0625 48.390625 27.6875 48.390625 \r\n",
       "Q 23 48.390625 18.546875 47.265625 \r\n",
       "Q 14.109375 46.140625 10.015625 43.890625 \r\n",
       "L 10.015625 52.203125 \r\n",
       "Q 14.9375 54.109375 19.578125 55.046875 \r\n",
       "Q 24.21875 56 28.609375 56 \r\n",
       "Q 40.484375 56 46.34375 49.84375 \r\n",
       "Q 52.203125 43.703125 52.203125 31.203125 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-7851\"/>\r\n",
       "       <path d=\"M 48.34375 48.53125 \r\n",
       "L 48.34375 54.34375 \r\n",
       "Q 51.3125 52.140625 53.453125 51.09375 \r\n",
       "Q 55.609375 50.046875 57.125 50.046875 \r\n",
       "Q 59.375 50.046875 60.5 51.390625 \r\n",
       "Q 61.625 52.734375 61.625 55.359375 \r\n",
       "Q 61.625 56.921875 61.25 58.4375 \r\n",
       "Q 60.890625 59.953125 60.15625 61.46875 \r\n",
       "L 66.65625 61.46875 \r\n",
       "Q 67.140625 59.609375 67.375 57.953125 \r\n",
       "Q 67.625 56.296875 67.625 54.828125 \r\n",
       "Q 67.625 48.875 65.5 46.0625 \r\n",
       "Q 63.375 43.25 58.84375 43.25 \r\n",
       "Q 56.5 43.25 53.9375 44.546875 \r\n",
       "Q 51.375 45.84375 48.34375 48.53125 \r\n",
       "z\r\n",
       "M 8.59375 21.578125 \r\n",
       "L 8.59375 54.6875 \r\n",
       "L 17.578125 54.6875 \r\n",
       "L 17.578125 21.921875 \r\n",
       "Q 17.578125 14.15625 20.609375 10.265625 \r\n",
       "Q 23.640625 6.390625 29.6875 6.390625 \r\n",
       "Q 36.96875 6.390625 41.1875 11.03125 \r\n",
       "Q 45.40625 15.671875 45.40625 23.6875 \r\n",
       "L 45.40625 54.6875 \r\n",
       "L 54.390625 54.6875 \r\n",
       "L 54.390625 0 \r\n",
       "L 45.40625 0 \r\n",
       "L 45.40625 8.40625 \r\n",
       "Q 42.140625 3.421875 37.8125 1 \r\n",
       "Q 33.5 -1.421875 27.78125 -1.421875 \r\n",
       "Q 18.359375 -1.421875 13.46875 4.4375 \r\n",
       "Q 8.59375 10.296875 8.59375 21.578125 \r\n",
       "z\r\n",
       "M 31.203125 56 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-432\"/>\r\n",
       "       <path d=\"M 37.40625 79.984375 \r\n",
       "L 47.125 79.984375 \r\n",
       "L 31.203125 61.625 \r\n",
       "L 23.734375 61.625 \r\n",
       "z\r\n",
       "M 41.015625 48.53125 \r\n",
       "L 41.015625 54.34375 \r\n",
       "Q 44 52.140625 46.140625 51.09375 \r\n",
       "Q 48.296875 50.046875 49.8125 50.046875 \r\n",
       "Q 52.046875 50.046875 53.171875 51.390625 \r\n",
       "Q 54.296875 52.734375 54.296875 55.359375 \r\n",
       "Q 54.296875 56.921875 53.921875 58.4375 \r\n",
       "Q 53.5625 59.953125 52.828125 61.46875 \r\n",
       "L 59.328125 61.46875 \r\n",
       "Q 59.8125 59.609375 60.046875 57.953125 \r\n",
       "Q 60.296875 56.296875 60.296875 54.828125 \r\n",
       "Q 60.296875 48.875 58.171875 46.0625 \r\n",
       "Q 56.0625 43.25 51.515625 43.25 \r\n",
       "Q 49.171875 43.25 46.609375 44.546875 \r\n",
       "Q 44.046875 45.84375 41.015625 48.53125 \r\n",
       "z\r\n",
       "M 30.859375 48.390625 \r\n",
       "Q 23.640625 48.390625 19.4375 42.75 \r\n",
       "Q 15.234375 37.109375 15.234375 27.296875 \r\n",
       "Q 15.234375 17.484375 19.40625 11.84375 \r\n",
       "Q 23.578125 6.203125 30.859375 6.203125 \r\n",
       "Q 38.03125 6.203125 42.234375 11.859375 \r\n",
       "Q 46.4375 17.53125 46.4375 27.296875 \r\n",
       "Q 46.4375 37.015625 42.234375 42.703125 \r\n",
       "Q 38.03125 48.390625 30.859375 48.390625 \r\n",
       "z\r\n",
       "M 30.859375 56 \r\n",
       "Q 42.578125 56 49.265625 48.375 \r\n",
       "Q 55.953125 40.765625 55.953125 27.296875 \r\n",
       "Q 55.953125 13.875 49.265625 6.21875 \r\n",
       "Q 42.578125 -1.421875 30.859375 -1.421875 \r\n",
       "Q 19.09375 -1.421875 12.421875 6.21875 \r\n",
       "Q 5.765625 13.875 5.765625 27.296875 \r\n",
       "Q 5.765625 40.765625 12.421875 48.375 \r\n",
       "Q 19.09375 56 30.859375 56 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-7899\"/>\r\n",
       "       <path d=\"M 20.703125 79.984375 \r\n",
       "L 30.421875 79.984375 \r\n",
       "L 14.5 61.625 \r\n",
       "L 7.03125 61.625 \r\n",
       "z\r\n",
       "M 9.421875 54.6875 \r\n",
       "L 18.40625 54.6875 \r\n",
       "L 18.40625 0 \r\n",
       "L 9.421875 0 \r\n",
       "z\r\n",
       "M 13.921875 56 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-237\"/>\r\n",
       "      </defs>\r\n",
       "      <use xlink:href=\"#DejaVuSans-67\"/>\r\n",
       "      <use x=\"69.824219\" xlink:href=\"#DejaVuSans-7905\"/>\r\n",
       "      <use x=\"131.005859\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"162.792969\" xlink:href=\"#DejaVuSans-109\"/>\r\n",
       "      <use x=\"260.205078\" xlink:href=\"#DejaVuSans-7851\"/>\r\n",
       "      <use x=\"321.484375\" xlink:href=\"#DejaVuSans-117\"/>\r\n",
       "      <use x=\"384.863281\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"416.650391\" xlink:href=\"#DejaVuSans-432\"/>\r\n",
       "      <use x=\"480.029297\" xlink:href=\"#DejaVuSans-7899\"/>\r\n",
       "      <use x=\"541.210938\" xlink:href=\"#DejaVuSans-99\"/>\r\n",
       "      <use x=\"596.191406\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"627.978516\" xlink:href=\"#DejaVuSans-116\"/>\r\n",
       "      <use x=\"667.1875\" xlink:href=\"#DejaVuSans-237\"/>\r\n",
       "      <use x=\"694.970703\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"758.349609\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_1\">\r\n",
       "    <path clip-path=\"url(#p8fca3177a8)\" d=\"M 139.613107 180.542055 \r\n",
       "L 139.613107 41.100812 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_2\">\r\n",
       "    <path clip-path=\"url(#p8fca3177a8)\" d=\"M 55.388123 130.420589 \r\n",
       "L 223.838091 130.420589 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_3\">\r\n",
       "    <path clip-path=\"url(#p8fca3177a8)\" d=\"M 139.613107 180.542055 \r\n",
       "L 139.613107 67.790933 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_4\">\r\n",
       "    <path clip-path=\"url(#p8fca3177a8)\" d=\"M 55.388123 130.420589 \r\n",
       "L 223.838091 130.420589 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_5\">\r\n",
       "    <path clip-path=\"url(#p8fca3177a8)\" d=\"M 139.613107 180.542055 \r\n",
       "L 139.613107 96.318741 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_6\">\r\n",
       "    <path clip-path=\"url(#p8fca3177a8)\" d=\"M 55.388123 130.420589 \r\n",
       "L 223.838091 130.420589 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_7\">\r\n",
       "    <path clip-path=\"url(#p8fca3177a8)\" d=\"M 139.613107 180.542055 \r\n",
       "L 139.613107 106.067862 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_8\">\r\n",
       "    <path clip-path=\"url(#p8fca3177a8)\" d=\"M 55.388123 130.420589 \r\n",
       "L 223.838091 130.420589 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_9\">\r\n",
       "    <path clip-path=\"url(#p8fca3177a8)\" d=\"M 139.613107 180.542055 \r\n",
       "L 139.613107 114.311975 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_10\">\r\n",
       "    <path clip-path=\"url(#p8fca3177a8)\" d=\"M 55.388123 130.420589 \r\n",
       "L 223.838091 130.420589 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_10\">\r\n",
       "    <path clip-path=\"url(#p8fca3177a8)\" d=\"M 55.388123 125.56495 \r\n",
       "L 58.825878 124.720379 \r\n",
       "L 62.263632 123.856196 \r\n",
       "L 65.701387 122.971788 \r\n",
       "L 69.139141 122.06652 \r\n",
       "L 72.576896 121.139731 \r\n",
       "L 76.01465 120.190732 \r\n",
       "L 79.452404 119.218809 \r\n",
       "L 82.890159 118.223217 \r\n",
       "L 86.327913 117.203181 \r\n",
       "L 89.765668 116.157895 \r\n",
       "L 93.203422 115.086518 \r\n",
       "L 96.641177 113.988175 \r\n",
       "L 100.078931 112.861953 \r\n",
       "L 103.516686 111.7069 \r\n",
       "L 106.95444 110.522024 \r\n",
       "L 110.392194 109.306289 \r\n",
       "L 113.829949 108.058615 \r\n",
       "L 117.267703 106.777872 \r\n",
       "L 120.705458 105.462882 \r\n",
       "L 124.143212 104.112412 \r\n",
       "L 127.580967 102.725175 \r\n",
       "L 131.018721 101.299824 \r\n",
       "L 134.456476 99.83495 \r\n",
       "L 137.89423 98.329077 \r\n",
       "L 141.331984 96.780662 \r\n",
       "L 144.769739 95.188086 \r\n",
       "L 148.207493 93.549655 \r\n",
       "L 151.645248 91.863591 \r\n",
       "L 155.083002 90.128029 \r\n",
       "L 158.520757 88.341013 \r\n",
       "L 161.958511 86.500489 \r\n",
       "L 165.396265 84.604298 \r\n",
       "L 168.83402 82.650174 \r\n",
       "L 172.271774 80.635731 \r\n",
       "L 175.709529 78.558462 \r\n",
       "L 179.147283 76.415727 \r\n",
       "L 182.585038 74.204745 \r\n",
       "L 186.022792 71.922588 \r\n",
       "L 189.460547 69.566166 \r\n",
       "L 192.898301 67.132223 \r\n",
       "L 196.336055 64.617321 \r\n",
       "L 199.77381 62.017828 \r\n",
       "L 203.211564 59.329908 \r\n",
       "L 206.649319 56.549505 \r\n",
       "L 210.087073 53.672326 \r\n",
       "L 213.524828 50.693828 \r\n",
       "L 216.962582 47.609197 \r\n",
       "L 220.400337 44.413329 \r\n",
       "L 223.838091 41.100812 \r\n",
       "\" style=\"fill:none;stroke:#1f77b4;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_11\">\r\n",
       "    <path clip-path=\"url(#p8fca3177a8)\" d=\"M 55.388123 136.087989 \r\n",
       "L 58.825878 135.405075 \r\n",
       "L 62.263632 134.706303 \r\n",
       "L 65.701387 133.991178 \r\n",
       "L 69.139141 133.259185 \r\n",
       "L 72.576896 132.50979 \r\n",
       "L 76.01465 131.742437 \r\n",
       "L 79.452404 130.956548 \r\n",
       "L 82.890159 130.15152 \r\n",
       "L 86.327913 129.326726 \r\n",
       "L 89.765668 128.481516 \r\n",
       "L 93.203422 127.615209 \r\n",
       "L 96.641177 126.727097 \r\n",
       "L 100.078931 125.816442 \r\n",
       "L 103.516686 124.882475 \r\n",
       "L 106.95444 123.924394 \r\n",
       "L 110.392194 122.94136 \r\n",
       "L 113.829949 121.9325 \r\n",
       "L 117.267703 120.896901 \r\n",
       "L 120.705458 119.83361 \r\n",
       "L 124.143212 118.741631 \r\n",
       "L 127.580967 117.619922 \r\n",
       "L 131.018721 116.467394 \r\n",
       "L 134.456476 115.282907 \r\n",
       "L 137.89423 114.06527 \r\n",
       "L 141.331984 112.813233 \r\n",
       "L 144.769739 111.525489 \r\n",
       "L 148.207493 110.200666 \r\n",
       "L 151.645248 108.837328 \r\n",
       "L 155.083002 107.433966 \r\n",
       "L 158.520757 105.988998 \r\n",
       "L 161.958511 104.500764 \r\n",
       "L 165.396265 102.967519 \r\n",
       "L 168.83402 101.387429 \r\n",
       "L 172.271774 99.758566 \r\n",
       "L 175.709529 98.078903 \r\n",
       "L 179.147283 96.346303 \r\n",
       "L 182.585038 94.55852 \r\n",
       "L 186.022792 92.713185 \r\n",
       "L 189.460547 90.807801 \r\n",
       "L 192.898301 88.839733 \r\n",
       "L 196.336055 86.806202 \r\n",
       "L 199.77381 84.704272 \r\n",
       "L 203.211564 82.530841 \r\n",
       "L 206.649319 80.282628 \r\n",
       "L 210.087073 77.956163 \r\n",
       "L 213.524828 75.547772 \r\n",
       "L 216.962582 73.053563 \r\n",
       "L 220.400337 70.469409 \r\n",
       "L 223.838091 67.790933 \r\n",
       "\" style=\"fill:none;stroke:#ff7f0e;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_12\">\r\n",
       "    <path clip-path=\"url(#p8fca3177a8)\" d=\"M 55.388123 147.335567 \r\n",
       "L 58.825878 146.825441 \r\n",
       "L 62.263632 146.303469 \r\n",
       "L 65.701387 145.769282 \r\n",
       "L 69.139141 145.222495 \r\n",
       "L 72.576896 144.662709 \r\n",
       "L 76.01465 144.089508 \r\n",
       "L 79.452404 143.502461 \r\n",
       "L 82.890159 142.901118 \r\n",
       "L 86.327913 142.28501 \r\n",
       "L 89.765668 141.653651 \r\n",
       "L 93.203422 141.006534 \r\n",
       "L 96.641177 140.343128 \r\n",
       "L 100.078931 139.662883 \r\n",
       "L 103.516686 138.965225 \r\n",
       "L 106.95444 138.249553 \r\n",
       "L 110.392194 137.515242 \r\n",
       "L 113.829949 136.761639 \r\n",
       "L 117.267703 135.988063 \r\n",
       "L 120.705458 135.193802 \r\n",
       "L 124.143212 134.37811 \r\n",
       "L 127.580967 133.540211 \r\n",
       "L 131.018721 132.679291 \r\n",
       "L 134.456476 131.794498 \r\n",
       "L 137.89423 130.884942 \r\n",
       "L 141.331984 129.949691 \r\n",
       "L 144.769739 128.987766 \r\n",
       "L 148.207493 127.998144 \r\n",
       "L 151.645248 126.979752 \r\n",
       "L 155.083002 125.931462 \r\n",
       "L 158.520757 124.852094 \r\n",
       "L 161.958511 123.740407 \r\n",
       "L 165.396265 122.595097 \r\n",
       "L 168.83402 121.414795 \r\n",
       "L 172.271774 120.19806 \r\n",
       "L 175.709529 118.943377 \r\n",
       "L 179.147283 117.649153 \r\n",
       "L 182.585038 116.313707 \r\n",
       "L 186.022792 114.935271 \r\n",
       "L 189.460547 113.511978 \r\n",
       "L 192.898301 112.041863 \r\n",
       "L 196.336055 110.522847 \r\n",
       "L 199.77381 108.952739 \r\n",
       "L 203.211564 107.32922 \r\n",
       "L 206.649319 105.64984 \r\n",
       "L 210.087073 103.912008 \r\n",
       "L 213.524828 102.112977 \r\n",
       "L 216.962582 100.249842 \r\n",
       "L 220.400337 98.31952 \r\n",
       "L 223.838091 96.318741 \r\n",
       "\" style=\"fill:none;stroke:#2ca02c;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_13\">\r\n",
       "    <path clip-path=\"url(#p8fca3177a8)\" d=\"M 55.388123 151.179325 \r\n",
       "L 58.825878 150.728248 \r\n",
       "L 62.263632 150.266696 \r\n",
       "L 65.701387 149.794343 \r\n",
       "L 69.139141 149.310848 \r\n",
       "L 72.576896 148.815859 \r\n",
       "L 76.01465 148.309008 \r\n",
       "L 79.452404 147.789914 \r\n",
       "L 82.890159 147.258178 \r\n",
       "L 86.327913 146.713387 \r\n",
       "L 89.765668 146.15511 \r\n",
       "L 93.203422 145.582898 \r\n",
       "L 96.641177 144.996284 \r\n",
       "L 100.078931 144.39478 \r\n",
       "L 103.516686 143.777877 \r\n",
       "L 106.95444 143.145047 \r\n",
       "L 110.392194 142.495735 \r\n",
       "L 113.829949 141.829364 \r\n",
       "L 117.267703 141.145332 \r\n",
       "L 120.705458 140.443009 \r\n",
       "L 124.143212 139.721736 \r\n",
       "L 127.580967 138.980827 \r\n",
       "L 131.018721 138.219561 \r\n",
       "L 134.456476 137.437186 \r\n",
       "L 137.89423 136.632914 \r\n",
       "L 141.331984 135.805921 \r\n",
       "L 144.769739 134.955342 \r\n",
       "L 148.207493 134.080272 \r\n",
       "L 151.645248 133.179762 \r\n",
       "L 155.083002 132.252815 \r\n",
       "L 158.520757 131.298388 \r\n",
       "L 161.958511 130.315382 \r\n",
       "L 165.396265 129.302645 \r\n",
       "L 168.83402 128.258966 \r\n",
       "L 172.271774 127.183073 \r\n",
       "L 175.709529 126.073624 \r\n",
       "L 179.147283 124.92921 \r\n",
       "L 182.585038 123.748346 \r\n",
       "L 186.022792 122.529468 \r\n",
       "L 189.460547 121.270927 \r\n",
       "L 192.898301 119.970982 \r\n",
       "L 196.336055 118.627797 \r\n",
       "L 199.77381 117.239434 \r\n",
       "L 203.211564 115.803843 \r\n",
       "L 206.649319 114.318857 \r\n",
       "L 210.087073 112.782184 \r\n",
       "L 213.524828 111.191397 \r\n",
       "L 216.962582 109.543926 \r\n",
       "L 220.400337 107.837045 \r\n",
       "L 223.838091 106.067862 \r\n",
       "\" style=\"fill:none;stroke:#d62728;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_14\">\r\n",
       "    <path clip-path=\"url(#p8fca3177a8)\" d=\"M 55.388123 154.429708 \r\n",
       "L 58.825878 154.028564 \r\n",
       "L 62.263632 153.618105 \r\n",
       "L 65.701387 153.19804 \r\n",
       "L 69.139141 152.768067 \r\n",
       "L 72.576896 152.327872 \r\n",
       "L 76.01465 151.877128 \r\n",
       "L 79.452404 151.415496 \r\n",
       "L 82.890159 150.942622 \r\n",
       "L 86.327913 150.458138 \r\n",
       "L 89.765668 149.961661 \r\n",
       "L 93.203422 149.452792 \r\n",
       "L 96.641177 148.931114 \r\n",
       "L 100.078931 148.396195 \r\n",
       "L 103.516686 147.847583 \r\n",
       "L 106.95444 147.284805 \r\n",
       "L 110.392194 146.70737 \r\n",
       "L 113.829949 146.114765 \r\n",
       "L 117.267703 145.506454 \r\n",
       "L 120.705458 144.881876 \r\n",
       "L 124.143212 144.240447 \r\n",
       "L 127.580967 143.581554 \r\n",
       "L 131.018721 142.904558 \r\n",
       "L 134.456476 142.20879 \r\n",
       "L 137.89423 141.493549 \r\n",
       "L 141.331984 140.758102 \r\n",
       "L 144.769739 140.00168 \r\n",
       "L 148.207493 139.223479 \r\n",
       "L 151.645248 138.422653 \r\n",
       "L 155.083002 137.598317 \r\n",
       "L 158.520757 136.749542 \r\n",
       "L 161.958511 135.875353 \r\n",
       "L 165.396265 134.974723 \r\n",
       "L 168.83402 134.046577 \r\n",
       "L 172.271774 133.089782 \r\n",
       "L 175.709529 132.103147 \r\n",
       "L 179.147283 131.085417 \r\n",
       "L 182.585038 130.035272 \r\n",
       "L 186.022792 128.951321 \r\n",
       "L 189.460547 127.832097 \r\n",
       "L 192.898301 126.676053 \r\n",
       "L 196.336055 125.481556 \r\n",
       "L 199.77381 124.246881 \r\n",
       "L 203.211564 122.970206 \r\n",
       "L 206.649319 121.649604 \r\n",
       "L 210.087073 120.283037 \r\n",
       "L 213.524828 118.868347 \r\n",
       "L 216.962582 117.403247 \r\n",
       "L 220.400337 115.885313 \r\n",
       "L 223.838091 114.311975 \r\n",
       "\" style=\"fill:none;stroke:#9467bd;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_3\">\r\n",
       "    <path d=\"M 46.965625 187.514117 \r\n",
       "L 46.965625 34.12875 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_4\">\r\n",
       "    <path d=\"M 232.260589 187.514117 \r\n",
       "L 232.260589 34.12875 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_5\">\r\n",
       "    <path d=\"M 46.965625 187.514117 \r\n",
       "L 232.260589 187.514117 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_6\">\r\n",
       "    <path d=\"M 46.965625 34.12875 \r\n",
       "L 232.260589 34.12875 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "  </g>\r\n",
       "  <g id=\"axes_2\">\r\n",
       "   <g id=\"patch_7\">\r\n",
       "    <path d=\"M 283.185589 187.514117 \r\n",
       "L 468.480554 187.514117 \r\n",
       "L 468.480554 34.12875 \r\n",
       "L 283.185589 34.12875 \r\n",
       "z\r\n",
       "\" style=\"fill:#ffffff;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"matplotlib.axis_3\">\r\n",
       "    <g id=\"xtick_4\">\r\n",
       "     <g id=\"line2d_15\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"291.608088\" xlink:href=\"#mc4737e2393\" y=\"187.514117\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_12\">\r\n",
       "      <!-- 6 -->\r\n",
       "      <g transform=\"translate(288.426838 202.112554)scale(0.1 -0.1)\">\r\n",
       "       <defs>\r\n",
       "        <path d=\"M 33.015625 40.375 \r\n",
       "Q 26.375 40.375 22.484375 35.828125 \r\n",
       "Q 18.609375 31.296875 18.609375 23.390625 \r\n",
       "Q 18.609375 15.53125 22.484375 10.953125 \r\n",
       "Q 26.375 6.390625 33.015625 6.390625 \r\n",
       "Q 39.65625 6.390625 43.53125 10.953125 \r\n",
       "Q 47.40625 15.53125 47.40625 23.390625 \r\n",
       "Q 47.40625 31.296875 43.53125 35.828125 \r\n",
       "Q 39.65625 40.375 33.015625 40.375 \r\n",
       "z\r\n",
       "M 52.59375 71.296875 \r\n",
       "L 52.59375 62.3125 \r\n",
       "Q 48.875 64.0625 45.09375 64.984375 \r\n",
       "Q 41.3125 65.921875 37.59375 65.921875 \r\n",
       "Q 27.828125 65.921875 22.671875 59.328125 \r\n",
       "Q 17.53125 52.734375 16.796875 39.40625 \r\n",
       "Q 19.671875 43.65625 24.015625 45.921875 \r\n",
       "Q 28.375 48.1875 33.59375 48.1875 \r\n",
       "Q 44.578125 48.1875 50.953125 41.515625 \r\n",
       "Q 57.328125 34.859375 57.328125 23.390625 \r\n",
       "Q 57.328125 12.15625 50.6875 5.359375 \r\n",
       "Q 44.046875 -1.421875 33.015625 -1.421875 \r\n",
       "Q 20.359375 -1.421875 13.671875 8.265625 \r\n",
       "Q 6.984375 17.96875 6.984375 36.375 \r\n",
       "Q 6.984375 53.65625 15.1875 63.9375 \r\n",
       "Q 23.390625 74.21875 37.203125 74.21875 \r\n",
       "Q 40.921875 74.21875 44.703125 73.484375 \r\n",
       "Q 48.484375 72.75 52.59375 71.296875 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-54\"/>\r\n",
       "       </defs>\r\n",
       "       <use xlink:href=\"#DejaVuSans-54\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"xtick_5\">\r\n",
       "     <g id=\"line2d_16\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"347.758077\" xlink:href=\"#mc4737e2393\" y=\"187.514117\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_13\">\r\n",
       "      <!-- 7 -->\r\n",
       "      <g transform=\"translate(344.576827 202.112554)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-55\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"xtick_6\">\r\n",
       "     <g id=\"line2d_17\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"403.908066\" xlink:href=\"#mc4737e2393\" y=\"187.514117\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_14\">\r\n",
       "      <!-- 8 -->\r\n",
       "      <g transform=\"translate(400.726816 202.112554)scale(0.1 -0.1)\">\r\n",
       "       <defs>\r\n",
       "        <path d=\"M 31.78125 34.625 \r\n",
       "Q 24.75 34.625 20.71875 30.859375 \r\n",
       "Q 16.703125 27.09375 16.703125 20.515625 \r\n",
       "Q 16.703125 13.921875 20.71875 10.15625 \r\n",
       "Q 24.75 6.390625 31.78125 6.390625 \r\n",
       "Q 38.8125 6.390625 42.859375 10.171875 \r\n",
       "Q 46.921875 13.96875 46.921875 20.515625 \r\n",
       "Q 46.921875 27.09375 42.890625 30.859375 \r\n",
       "Q 38.875 34.625 31.78125 34.625 \r\n",
       "z\r\n",
       "M 21.921875 38.8125 \r\n",
       "Q 15.578125 40.375 12.03125 44.71875 \r\n",
       "Q 8.5 49.078125 8.5 55.328125 \r\n",
       "Q 8.5 64.0625 14.71875 69.140625 \r\n",
       "Q 20.953125 74.21875 31.78125 74.21875 \r\n",
       "Q 42.671875 74.21875 48.875 69.140625 \r\n",
       "Q 55.078125 64.0625 55.078125 55.328125 \r\n",
       "Q 55.078125 49.078125 51.53125 44.71875 \r\n",
       "Q 48 40.375 41.703125 38.8125 \r\n",
       "Q 48.828125 37.15625 52.796875 32.3125 \r\n",
       "Q 56.78125 27.484375 56.78125 20.515625 \r\n",
       "Q 56.78125 9.90625 50.3125 4.234375 \r\n",
       "Q 43.84375 -1.421875 31.78125 -1.421875 \r\n",
       "Q 19.734375 -1.421875 13.25 4.234375 \r\n",
       "Q 6.78125 9.90625 6.78125 20.515625 \r\n",
       "Q 6.78125 27.484375 10.78125 32.3125 \r\n",
       "Q 14.796875 37.15625 21.921875 38.8125 \r\n",
       "z\r\n",
       "M 18.3125 54.390625 \r\n",
       "Q 18.3125 48.734375 21.84375 45.5625 \r\n",
       "Q 25.390625 42.390625 31.78125 42.390625 \r\n",
       "Q 38.140625 42.390625 41.71875 45.5625 \r\n",
       "Q 45.3125 48.734375 45.3125 54.390625 \r\n",
       "Q 45.3125 60.0625 41.71875 63.234375 \r\n",
       "Q 38.140625 66.40625 31.78125 66.40625 \r\n",
       "Q 25.390625 66.40625 21.84375 63.234375 \r\n",
       "Q 18.3125 60.0625 18.3125 54.390625 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-56\"/>\r\n",
       "       </defs>\r\n",
       "       <use xlink:href=\"#DejaVuSans-56\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"xtick_7\">\r\n",
       "     <g id=\"line2d_18\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"460.058055\" xlink:href=\"#mc4737e2393\" y=\"187.514117\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_15\">\r\n",
       "      <!-- 9 -->\r\n",
       "      <g transform=\"translate(456.876805 202.112554)scale(0.1 -0.1)\">\r\n",
       "       <defs>\r\n",
       "        <path d=\"M 10.984375 1.515625 \r\n",
       "L 10.984375 10.5 \r\n",
       "Q 14.703125 8.734375 18.5 7.8125 \r\n",
       "Q 22.3125 6.890625 25.984375 6.890625 \r\n",
       "Q 35.75 6.890625 40.890625 13.453125 \r\n",
       "Q 46.046875 20.015625 46.78125 33.40625 \r\n",
       "Q 43.953125 29.203125 39.59375 26.953125 \r\n",
       "Q 35.25 24.703125 29.984375 24.703125 \r\n",
       "Q 19.046875 24.703125 12.671875 31.3125 \r\n",
       "Q 6.296875 37.9375 6.296875 49.421875 \r\n",
       "Q 6.296875 60.640625 12.9375 67.421875 \r\n",
       "Q 19.578125 74.21875 30.609375 74.21875 \r\n",
       "Q 43.265625 74.21875 49.921875 64.515625 \r\n",
       "Q 56.59375 54.828125 56.59375 36.375 \r\n",
       "Q 56.59375 19.140625 48.40625 8.859375 \r\n",
       "Q 40.234375 -1.421875 26.421875 -1.421875 \r\n",
       "Q 22.703125 -1.421875 18.890625 -0.6875 \r\n",
       "Q 15.09375 0.046875 10.984375 1.515625 \r\n",
       "z\r\n",
       "M 30.609375 32.421875 \r\n",
       "Q 37.25 32.421875 41.125 36.953125 \r\n",
       "Q 45.015625 41.5 45.015625 49.421875 \r\n",
       "Q 45.015625 57.28125 41.125 61.84375 \r\n",
       "Q 37.25 66.40625 30.609375 66.40625 \r\n",
       "Q 23.96875 66.40625 20.09375 61.84375 \r\n",
       "Q 16.21875 57.28125 16.21875 49.421875 \r\n",
       "Q 16.21875 41.5 20.09375 36.953125 \r\n",
       "Q 23.96875 32.421875 30.609375 32.421875 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-57\"/>\r\n",
       "       </defs>\r\n",
       "       <use xlink:href=\"#DejaVuSans-57\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"text_16\">\r\n",
       "     <!-- Trung bình thay đổi nhóm can thiệp -->\r\n",
       "     <g transform=\"translate(286.721353 216.814117)scale(0.1 -0.1)\">\r\n",
       "      <defs>\r\n",
       "       <path d=\"M 27.203125 -6.890625 \r\n",
       "L 36.1875 -6.890625 \r\n",
       "L 36.1875 -18.3125 \r\n",
       "L 27.203125 -18.3125 \r\n",
       "z\r\n",
       "M 56.203125 29.59375 \r\n",
       "L 56.203125 25.203125 \r\n",
       "L 14.890625 25.203125 \r\n",
       "Q 15.484375 15.921875 20.484375 11.0625 \r\n",
       "Q 25.484375 6.203125 34.421875 6.203125 \r\n",
       "Q 39.59375 6.203125 44.453125 7.46875 \r\n",
       "Q 49.3125 8.734375 54.109375 11.28125 \r\n",
       "L 54.109375 2.78125 \r\n",
       "Q 49.265625 0.734375 44.1875 -0.34375 \r\n",
       "Q 39.109375 -1.421875 33.890625 -1.421875 \r\n",
       "Q 20.796875 -1.421875 13.15625 6.1875 \r\n",
       "Q 5.515625 13.8125 5.515625 26.8125 \r\n",
       "Q 5.515625 40.234375 12.765625 48.109375 \r\n",
       "Q 20.015625 56 32.328125 56 \r\n",
       "Q 43.359375 56 49.78125 48.890625 \r\n",
       "Q 56.203125 41.796875 56.203125 29.59375 \r\n",
       "z\r\n",
       "M 47.21875 32.234375 \r\n",
       "Q 47.125 39.59375 43.09375 43.984375 \r\n",
       "Q 39.0625 48.390625 32.421875 48.390625 \r\n",
       "Q 24.90625 48.390625 20.390625 44.140625 \r\n",
       "Q 15.875 39.890625 15.1875 32.171875 \r\n",
       "z\r\n",
       "M 27.203125 -6.890625 \r\n",
       "L 36.1875 -6.890625 \r\n",
       "L 36.1875 -18.3125 \r\n",
       "L 27.203125 -18.3125 \r\n",
       "z\r\n",
       "M 28.171875 79.984375 \r\n",
       "L 35.40625 79.984375 \r\n",
       "L 47.359375 61.625 \r\n",
       "L 40.578125 61.625 \r\n",
       "L 31.78125 73.578125 \r\n",
       "L 23 61.625 \r\n",
       "L 16.21875 61.625 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-7879\"/>\r\n",
       "       <path d=\"M 18.109375 8.203125 \r\n",
       "L 18.109375 -20.796875 \r\n",
       "L 9.078125 -20.796875 \r\n",
       "L 9.078125 54.6875 \r\n",
       "L 18.109375 54.6875 \r\n",
       "L 18.109375 46.390625 \r\n",
       "Q 20.953125 51.265625 25.265625 53.625 \r\n",
       "Q 29.59375 56 35.59375 56 \r\n",
       "Q 45.5625 56 51.78125 48.09375 \r\n",
       "Q 58.015625 40.1875 58.015625 27.296875 \r\n",
       "Q 58.015625 14.40625 51.78125 6.484375 \r\n",
       "Q 45.5625 -1.421875 35.59375 -1.421875 \r\n",
       "Q 29.59375 -1.421875 25.265625 0.953125 \r\n",
       "Q 20.953125 3.328125 18.109375 8.203125 \r\n",
       "z\r\n",
       "M 48.6875 27.296875 \r\n",
       "Q 48.6875 37.203125 44.609375 42.84375 \r\n",
       "Q 40.53125 48.484375 33.40625 48.484375 \r\n",
       "Q 26.265625 48.484375 22.1875 42.84375 \r\n",
       "Q 18.109375 37.203125 18.109375 27.296875 \r\n",
       "Q 18.109375 17.390625 22.1875 11.75 \r\n",
       "Q 26.265625 6.109375 33.40625 6.109375 \r\n",
       "Q 40.53125 6.109375 44.609375 11.75 \r\n",
       "Q 48.6875 17.390625 48.6875 27.296875 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-112\"/>\r\n",
       "      </defs>\r\n",
       "      <use xlink:href=\"#DejaVuSans-84\"/>\r\n",
       "      <use x=\"46.333984\" xlink:href=\"#DejaVuSans-114\"/>\r\n",
       "      <use x=\"87.447266\" xlink:href=\"#DejaVuSans-117\"/>\r\n",
       "      <use x=\"150.826172\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"214.205078\" xlink:href=\"#DejaVuSans-103\"/>\r\n",
       "      <use x=\"277.681641\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"309.46875\" xlink:href=\"#DejaVuSans-98\"/>\r\n",
       "      <use x=\"372.945312\" xlink:href=\"#DejaVuSans-236\"/>\r\n",
       "      <use x=\"400.728516\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"464.107422\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "      <use x=\"527.486328\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"559.273438\" xlink:href=\"#DejaVuSans-116\"/>\r\n",
       "      <use x=\"598.482422\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "      <use x=\"661.861328\" xlink:href=\"#DejaVuSans-97\"/>\r\n",
       "      <use x=\"723.140625\" xlink:href=\"#DejaVuSans-121\"/>\r\n",
       "      <use x=\"782.320312\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"814.107422\" xlink:href=\"#DejaVuSans-273\"/>\r\n",
       "      <use x=\"877.583984\" xlink:href=\"#DejaVuSans-7893\"/>\r\n",
       "      <use x=\"938.765625\" xlink:href=\"#DejaVuSans-105\"/>\r\n",
       "      <use x=\"966.548828\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"998.335938\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"1061.714844\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "      <use x=\"1125.09375\" xlink:href=\"#DejaVuSans-243\"/>\r\n",
       "      <use x=\"1186.275391\" xlink:href=\"#DejaVuSans-109\"/>\r\n",
       "      <use x=\"1283.6875\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"1315.474609\" xlink:href=\"#DejaVuSans-99\"/>\r\n",
       "      <use x=\"1370.455078\" xlink:href=\"#DejaVuSans-97\"/>\r\n",
       "      <use x=\"1431.734375\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"1495.113281\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"1526.900391\" xlink:href=\"#DejaVuSans-116\"/>\r\n",
       "      <use x=\"1566.109375\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "      <use x=\"1629.488281\" xlink:href=\"#DejaVuSans-105\"/>\r\n",
       "      <use x=\"1657.271484\" xlink:href=\"#DejaVuSans-7879\"/>\r\n",
       "      <use x=\"1718.794922\" xlink:href=\"#DejaVuSans-112\"/>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "   </g>\r\n",
       "   <g id=\"matplotlib.axis_4\">\r\n",
       "    <g id=\"ytick_7\">\r\n",
       "     <g id=\"line2d_19\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"283.185589\" xlink:href=\"#m6a8762d578\" y=\"180.542055\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_17\">\r\n",
       "      <!-- 0 -->\r\n",
       "      <g transform=\"translate(269.823089 184.341273)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_8\">\r\n",
       "     <g id=\"line2d_20\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"283.185589\" xlink:href=\"#m6a8762d578\" y=\"153.375938\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_18\">\r\n",
       "      <!-- 50 -->\r\n",
       "      <g transform=\"translate(263.460589 157.175157)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_9\">\r\n",
       "     <g id=\"line2d_21\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"283.185589\" xlink:href=\"#m6a8762d578\" y=\"126.209822\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_19\">\r\n",
       "      <!-- 100 -->\r\n",
       "      <g transform=\"translate(257.098089 130.009041)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-49\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "       <use x=\"127.246094\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_10\">\r\n",
       "     <g id=\"line2d_22\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"283.185589\" xlink:href=\"#m6a8762d578\" y=\"99.043706\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_20\">\r\n",
       "      <!-- 150 -->\r\n",
       "      <g transform=\"translate(257.098089 102.842924)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-49\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "       <use x=\"127.246094\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_11\">\r\n",
       "     <g id=\"line2d_23\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"283.185589\" xlink:href=\"#m6a8762d578\" y=\"71.877589\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_21\">\r\n",
       "      <!-- 200 -->\r\n",
       "      <g transform=\"translate(257.098089 75.676808)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-50\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "       <use x=\"127.246094\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_12\">\r\n",
       "     <g id=\"line2d_24\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"283.185589\" xlink:href=\"#m6a8762d578\" y=\"44.711473\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_22\">\r\n",
       "      <!-- 250 -->\r\n",
       "      <g transform=\"translate(257.098089 48.510692)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-50\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "       <use x=\"127.246094\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"text_23\">\r\n",
       "     <!-- Cỡ mẫu ước tính -->\r\n",
       "     <g transform=\"translate(251.018402 151.90659)rotate(-90)scale(0.1 -0.1)\">\r\n",
       "      <use xlink:href=\"#DejaVuSans-67\"/>\r\n",
       "      <use x=\"69.824219\" xlink:href=\"#DejaVuSans-7905\"/>\r\n",
       "      <use x=\"131.005859\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"162.792969\" xlink:href=\"#DejaVuSans-109\"/>\r\n",
       "      <use x=\"260.205078\" xlink:href=\"#DejaVuSans-7851\"/>\r\n",
       "      <use x=\"321.484375\" xlink:href=\"#DejaVuSans-117\"/>\r\n",
       "      <use x=\"384.863281\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"416.650391\" xlink:href=\"#DejaVuSans-432\"/>\r\n",
       "      <use x=\"480.029297\" xlink:href=\"#DejaVuSans-7899\"/>\r\n",
       "      <use x=\"541.210938\" xlink:href=\"#DejaVuSans-99\"/>\r\n",
       "      <use x=\"596.191406\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"627.978516\" xlink:href=\"#DejaVuSans-116\"/>\r\n",
       "      <use x=\"667.1875\" xlink:href=\"#DejaVuSans-237\"/>\r\n",
       "      <use x=\"694.970703\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"758.349609\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_11\">\r\n",
       "    <path clip-path=\"url(#pcb3b07f7aa)\" d=\"M 375.833072 180.542055 \r\n",
       "L 375.833072 41.100812 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_12\">\r\n",
       "    <path clip-path=\"url(#pcb3b07f7aa)\" d=\"M 291.608088 153.040564 \r\n",
       "L 460.058055 153.040564 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_13\">\r\n",
       "    <path clip-path=\"url(#pcb3b07f7aa)\" d=\"M 375.833072 180.542055 \r\n",
       "L 375.833072 67.790933 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_14\">\r\n",
       "    <path clip-path=\"url(#pcb3b07f7aa)\" d=\"M 291.608088 153.040564 \r\n",
       "L 460.058055 153.040564 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_15\">\r\n",
       "    <path clip-path=\"url(#pcb3b07f7aa)\" d=\"M 375.833072 180.542055 \r\n",
       "L 375.833072 96.318741 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_16\">\r\n",
       "    <path clip-path=\"url(#pcb3b07f7aa)\" d=\"M 291.608088 153.040564 \r\n",
       "L 460.058055 153.040564 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_17\">\r\n",
       "    <path clip-path=\"url(#pcb3b07f7aa)\" d=\"M 375.833072 180.542055 \r\n",
       "L 375.833072 106.067862 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_18\">\r\n",
       "    <path clip-path=\"url(#pcb3b07f7aa)\" d=\"M 291.608088 153.040564 \r\n",
       "L 460.058055 153.040564 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_19\">\r\n",
       "    <path clip-path=\"url(#pcb3b07f7aa)\" d=\"M 375.833072 180.542055 \r\n",
       "L 375.833072 114.311975 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_20\">\r\n",
       "    <path clip-path=\"url(#pcb3b07f7aa)\" d=\"M 291.608088 153.040564 \r\n",
       "L 460.058055 153.040564 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_25\">\r\n",
       "    <path clip-path=\"url(#pcb3b07f7aa)\" d=\"M 291.608088 41.100812 \r\n",
       "L 295.045842 49.261426 \r\n",
       "L 298.483597 56.72607 \r\n",
       "L 301.921351 63.571691 \r\n",
       "L 305.359105 69.86489 \r\n",
       "L 308.79686 75.663545 \r\n",
       "L 312.234614 81.018148 \r\n",
       "L 315.672369 85.972907 \r\n",
       "L 319.110123 90.566665 \r\n",
       "L 322.547878 94.833658 \r\n",
       "L 325.985632 98.804158 \r\n",
       "L 329.423387 102.505012 \r\n",
       "L 332.861141 105.960094 \r\n",
       "L 336.298895 109.190694 \r\n",
       "L 339.73665 112.215846 \r\n",
       "L 343.174404 115.052608 \r\n",
       "L 346.612159 117.716304 \r\n",
       "L 350.049913 120.220732 \r\n",
       "L 353.487668 122.578339 \r\n",
       "L 356.925422 124.800382 \r\n",
       "L 360.363177 126.897058 \r\n",
       "L 363.800931 128.877624 \r\n",
       "L 367.238685 130.750499 \r\n",
       "L 370.67644 132.523349 \r\n",
       "L 374.114194 134.203172 \r\n",
       "L 377.551949 135.796367 \r\n",
       "L 380.989703 137.308787 \r\n",
       "L 384.427458 138.745803 \r\n",
       "L 387.865212 140.112345 \r\n",
       "L 391.302967 141.412947 \r\n",
       "L 394.740721 142.651785 \r\n",
       "L 398.178475 143.832707 \r\n",
       "L 401.61623 144.95927 \r\n",
       "L 405.053984 146.034758 \r\n",
       "L 408.491739 147.062212 \r\n",
       "L 411.929493 148.044452 \r\n",
       "L 415.367248 148.984092 \r\n",
       "L 418.805002 149.88356 \r\n",
       "L 422.242756 150.745114 \r\n",
       "L 425.680511 151.570855 \r\n",
       "L 429.118265 152.362741 \r\n",
       "L 432.55602 153.122598 \r\n",
       "L 435.993774 153.852129 \r\n",
       "L 439.431529 154.552928 \r\n",
       "L 442.869283 155.226484 \r\n",
       "L 446.307038 155.87419 \r\n",
       "L 449.744792 156.497353 \r\n",
       "L 453.182546 157.097197 \r\n",
       "L 456.620301 157.674872 \r\n",
       "L 460.058055 158.231456 \r\n",
       "\" style=\"fill:none;stroke:#1f77b4;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_26\">\r\n",
       "    <path clip-path=\"url(#pcb3b07f7aa)\" d=\"M 291.608088 67.790933 \r\n",
       "L 295.045842 74.389543 \r\n",
       "L 298.483597 80.425397 \r\n",
       "L 301.921351 85.960714 \r\n",
       "L 305.359105 91.049346 \r\n",
       "L 308.79686 95.738094 \r\n",
       "L 312.234614 100.067785 \r\n",
       "L 315.672369 104.074166 \r\n",
       "L 319.110123 107.788644 \r\n",
       "L 322.547878 111.238901 \r\n",
       "L 325.985632 114.449417 \r\n",
       "L 329.423387 117.441899 \r\n",
       "L 332.861141 120.235652 \r\n",
       "L 336.298895 122.84789 \r\n",
       "L 339.73665 125.294005 \r\n",
       "L 343.174404 127.587789 \r\n",
       "L 346.612159 129.741634 \r\n",
       "L 350.049913 131.766694 \r\n",
       "L 353.487668 133.673038 \r\n",
       "L 356.925422 135.469764 \r\n",
       "L 360.363177 137.165121 \r\n",
       "L 363.800931 138.766592 \r\n",
       "L 367.238685 140.280983 \r\n",
       "L 370.67644 141.714496 \r\n",
       "L 374.114194 143.072789 \r\n",
       "L 377.551949 144.361034 \r\n",
       "L 380.989703 145.583965 \r\n",
       "L 384.427458 146.745926 \r\n",
       "L 387.865212 147.850901 \r\n",
       "L 391.302967 148.902558 \r\n",
       "L 394.740721 149.904273 \r\n",
       "L 398.178475 150.859157 \r\n",
       "L 401.61623 151.770087 \r\n",
       "L 405.053984 152.639718 \r\n",
       "L 408.491739 153.47051 \r\n",
       "L 411.929493 154.264742 \r\n",
       "L 415.367248 155.024528 \r\n",
       "L 418.805002 155.751831 \r\n",
       "L 422.242756 156.448477 \r\n",
       "L 425.680511 157.116164 \r\n",
       "L 429.118265 157.756477 \r\n",
       "L 432.55602 158.370892 \r\n",
       "L 435.993774 158.960785 \r\n",
       "L 439.431529 159.527446 \r\n",
       "L 442.869283 160.072078 \r\n",
       "L 446.307038 160.595808 \r\n",
       "L 449.744792 161.099693 \r\n",
       "L 453.182546 161.584722 \r\n",
       "L 456.620301 162.051826 \r\n",
       "L 460.058055 162.501875 \r\n",
       "\" style=\"fill:none;stroke:#ff7f0e;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_27\">\r\n",
       "    <path clip-path=\"url(#pcb3b07f7aa)\" d=\"M 291.608088 96.318741 \r\n",
       "L 295.045842 101.247798 \r\n",
       "L 298.483597 105.756486 \r\n",
       "L 301.921351 109.891281 \r\n",
       "L 305.359105 113.692409 \r\n",
       "L 308.79686 117.19483 \r\n",
       "L 312.234614 120.429041 \r\n",
       "L 315.672369 123.421745 \r\n",
       "L 319.110123 126.196401 \r\n",
       "L 322.547878 128.773689 \r\n",
       "L 325.985632 131.171894 \r\n",
       "L 329.423387 133.407231 \r\n",
       "L 332.861141 135.49412 \r\n",
       "L 336.298895 137.445421 \r\n",
       "L 339.73665 139.272631 \r\n",
       "L 343.174404 140.986051 \r\n",
       "L 346.612159 142.594939 \r\n",
       "L 350.049913 144.107628 \r\n",
       "L 353.487668 145.531636 \r\n",
       "L 356.925422 146.873763 \r\n",
       "L 360.363177 148.140168 \r\n",
       "L 363.800931 149.336441 \r\n",
       "L 367.238685 150.467668 \r\n",
       "L 370.67644 151.538479 \r\n",
       "L 374.114194 152.553103 \r\n",
       "L 377.551949 153.515401 \r\n",
       "L 380.989703 154.428912 \r\n",
       "L 384.427458 155.296878 \r\n",
       "L 387.865212 156.122277 \r\n",
       "L 391.302967 156.907848 \r\n",
       "L 394.740721 157.656113 \r\n",
       "L 398.178475 158.369397 \r\n",
       "L 401.61623 159.049847 \r\n",
       "L 405.053984 159.699448 \r\n",
       "L 408.491739 160.320037 \r\n",
       "L 411.929493 160.913316 \r\n",
       "L 415.367248 161.480863 \r\n",
       "L 418.805002 162.024147 \r\n",
       "L 422.242756 162.544531 \r\n",
       "L 425.680511 163.043283 \r\n",
       "L 429.118265 163.521587 \r\n",
       "L 432.55602 163.980545 \r\n",
       "L 435.993774 164.421186 \r\n",
       "L 439.431529 164.844473 \r\n",
       "L 442.869283 165.251304 \r\n",
       "L 446.307038 165.642522 \r\n",
       "L 449.744792 166.018916 \r\n",
       "L 453.182546 166.381226 \r\n",
       "L 456.620301 166.730144 \r\n",
       "L 460.058055 167.066324 \r\n",
       "\" style=\"fill:none;stroke:#2ca02c;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_28\">\r\n",
       "    <path clip-path=\"url(#pcb3b07f7aa)\" d=\"M 291.608088 106.067862 \r\n",
       "L 295.045842 110.426365 \r\n",
       "L 298.483597 114.413158 \r\n",
       "L 301.921351 118.069337 \r\n",
       "L 305.359105 121.430472 \r\n",
       "L 308.79686 124.527477 \r\n",
       "L 312.234614 127.387317 \r\n",
       "L 315.672369 130.033606 \r\n",
       "L 319.110123 132.487086 \r\n",
       "L 322.547878 134.766045 \r\n",
       "L 325.985632 136.88665 \r\n",
       "L 329.423387 138.86324 \r\n",
       "L 332.861141 140.708565 \r\n",
       "L 336.298895 142.433996 \r\n",
       "L 339.73665 144.0497 \r\n",
       "L 343.174404 145.564787 \r\n",
       "L 346.612159 146.987441 \r\n",
       "L 350.049913 148.325031 \r\n",
       "L 353.487668 149.584205 \r\n",
       "L 356.925422 150.770977 \r\n",
       "L 360.363177 151.890791 \r\n",
       "L 363.800931 152.948592 \r\n",
       "L 367.238685 153.948875 \r\n",
       "L 370.67644 154.895737 \r\n",
       "L 374.114194 155.792915 \r\n",
       "L 377.551949 156.643824 \r\n",
       "L 380.989703 157.451593 \r\n",
       "L 384.427458 158.219089 \r\n",
       "L 387.865212 158.948946 \r\n",
       "L 391.302967 159.643584 \r\n",
       "L 394.740721 160.305235 \r\n",
       "L 398.178475 160.935954 \r\n",
       "L 401.61623 161.53764 \r\n",
       "L 405.053984 162.112047 \r\n",
       "L 408.491739 162.660801 \r\n",
       "L 411.929493 163.185406 \r\n",
       "L 415.367248 163.687258 \r\n",
       "L 418.805002 164.167655 \r\n",
       "L 422.242756 164.627803 \r\n",
       "L 425.680511 165.068823 \r\n",
       "L 429.118265 165.491761 \r\n",
       "L 432.55602 165.897593 \r\n",
       "L 435.993774 166.287229 \r\n",
       "L 439.431529 166.661518 \r\n",
       "L 442.869283 167.021258 \r\n",
       "L 446.307038 167.367191 \r\n",
       "L 449.744792 167.700017 \r\n",
       "L 453.182546 168.020388 \r\n",
       "L 456.620301 168.328918 \r\n",
       "L 460.058055 168.626184 \r\n",
       "\" style=\"fill:none;stroke:#d62728;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_29\">\r\n",
       "    <path clip-path=\"url(#pcb3b07f7aa)\" d=\"M 291.608088 114.311975 \r\n",
       "L 295.045842 118.188002 \r\n",
       "L 298.483597 121.733466 \r\n",
       "L 301.921351 124.984915 \r\n",
       "L 305.359105 127.973981 \r\n",
       "L 308.79686 130.728155 \r\n",
       "L 312.234614 133.271418 \r\n",
       "L 315.672369 135.624768 \r\n",
       "L 319.110123 137.806655 \r\n",
       "L 322.547878 139.833338 \r\n",
       "L 325.985632 141.719198 \r\n",
       "L 329.423387 143.476983 \r\n",
       "L 332.861141 145.118035 \r\n",
       "L 336.298895 146.652466 \r\n",
       "L 339.73665 148.089315 \r\n",
       "L 343.174404 149.436686 \r\n",
       "L 346.612159 150.701855 \r\n",
       "L 350.049913 151.891377 \r\n",
       "L 353.487668 153.011164 \r\n",
       "L 356.925422 154.066563 \r\n",
       "L 360.363177 155.062416 \r\n",
       "L 363.800931 156.003121 \r\n",
       "L 367.238685 156.892676 \r\n",
       "L 370.67644 157.734722 \r\n",
       "L 374.114194 158.532584 \r\n",
       "L 377.551949 159.2893 \r\n",
       "L 380.989703 160.007651 \r\n",
       "L 384.427458 160.690187 \r\n",
       "L 387.865212 161.33925 \r\n",
       "L 391.302967 161.956994 \r\n",
       "L 394.740721 162.545402 \r\n",
       "L 398.178475 163.106302 \r\n",
       "L 401.61623 163.641383 \r\n",
       "L 405.053984 164.152205 \r\n",
       "L 408.491739 164.640212 \r\n",
       "L 411.929493 165.106745 \r\n",
       "L 415.367248 165.553043 \r\n",
       "L 418.805002 165.980261 \r\n",
       "L 422.242756 166.389472 \r\n",
       "L 425.680511 166.781672 \r\n",
       "L 429.118265 167.157792 \r\n",
       "L 432.55602 167.518699 \r\n",
       "L 435.993774 167.865203 \r\n",
       "L 439.431529 168.19806 \r\n",
       "L 442.869283 168.517977 \r\n",
       "L 446.307038 168.825617 \r\n",
       "L 449.744792 169.121599 \r\n",
       "L 453.182546 169.406506 \r\n",
       "L 456.620301 169.680882 \r\n",
       "L 460.058055 169.945242 \r\n",
       "\" style=\"fill:none;stroke:#9467bd;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_8\">\r\n",
       "    <path d=\"M 283.185589 187.514117 \r\n",
       "L 283.185589 34.12875 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_9\">\r\n",
       "    <path d=\"M 468.480554 187.514117 \r\n",
       "L 468.480554 34.12875 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_10\">\r\n",
       "    <path d=\"M 283.185589 187.514117 \r\n",
       "L 468.480554 187.514117 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_11\">\r\n",
       "    <path d=\"M 283.185589 34.12875 \r\n",
       "L 468.480554 34.12875 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "  </g>\r\n",
       "  <g id=\"axes_3\">\r\n",
       "   <g id=\"patch_12\">\r\n",
       "    <path d=\"M 519.405554 187.514117 \r\n",
       "L 704.700518 187.514117 \r\n",
       "L 704.700518 34.12875 \r\n",
       "L 519.405554 34.12875 \r\n",
       "z\r\n",
       "\" style=\"fill:#ffffff;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"matplotlib.axis_5\">\r\n",
       "    <g id=\"xtick_8\">\r\n",
       "     <g id=\"line2d_30\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"551.892333\" xlink:href=\"#mc4737e2393\" y=\"187.514117\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_24\">\r\n",
       "      <!-- 3.0 -->\r\n",
       "      <g transform=\"translate(543.940771 202.112554)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-51\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-46\"/>\r\n",
       "       <use x=\"95.410156\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"xtick_9\">\r\n",
       "     <g id=\"line2d_31\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"612.053036\" xlink:href=\"#mc4737e2393\" y=\"187.514117\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_25\">\r\n",
       "      <!-- 3.5 -->\r\n",
       "      <g transform=\"translate(604.101473 202.112554)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-51\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-46\"/>\r\n",
       "       <use x=\"95.410156\" xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"xtick_10\">\r\n",
       "     <g id=\"line2d_32\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"672.213739\" xlink:href=\"#mc4737e2393\" y=\"187.514117\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_26\">\r\n",
       "      <!-- 4.0 -->\r\n",
       "      <g transform=\"translate(664.262176 202.112554)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-52\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-46\"/>\r\n",
       "       <use x=\"95.410156\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"text_27\">\r\n",
       "     <!-- Hiệu ứng delta -->\r\n",
       "     <g transform=\"translate(575.304598 216.190679)scale(0.1 -0.1)\">\r\n",
       "      <defs>\r\n",
       "       <path d=\"M 9.8125 72.90625 \r\n",
       "L 19.671875 72.90625 \r\n",
       "L 19.671875 43.015625 \r\n",
       "L 55.515625 43.015625 \r\n",
       "L 55.515625 72.90625 \r\n",
       "L 65.375 72.90625 \r\n",
       "L 65.375 0 \r\n",
       "L 55.515625 0 \r\n",
       "L 55.515625 34.71875 \r\n",
       "L 19.671875 34.71875 \r\n",
       "L 19.671875 0 \r\n",
       "L 9.8125 0 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-72\"/>\r\n",
       "       <path d=\"M 45.40625 46.390625 \r\n",
       "L 45.40625 75.984375 \r\n",
       "L 54.390625 75.984375 \r\n",
       "L 54.390625 0 \r\n",
       "L 45.40625 0 \r\n",
       "L 45.40625 8.203125 \r\n",
       "Q 42.578125 3.328125 38.25 0.953125 \r\n",
       "Q 33.9375 -1.421875 27.875 -1.421875 \r\n",
       "Q 17.96875 -1.421875 11.734375 6.484375 \r\n",
       "Q 5.515625 14.40625 5.515625 27.296875 \r\n",
       "Q 5.515625 40.1875 11.734375 48.09375 \r\n",
       "Q 17.96875 56 27.875 56 \r\n",
       "Q 33.9375 56 38.25 53.625 \r\n",
       "Q 42.578125 51.265625 45.40625 46.390625 \r\n",
       "z\r\n",
       "M 14.796875 27.296875 \r\n",
       "Q 14.796875 17.390625 18.875 11.75 \r\n",
       "Q 22.953125 6.109375 30.078125 6.109375 \r\n",
       "Q 37.203125 6.109375 41.296875 11.75 \r\n",
       "Q 45.40625 17.390625 45.40625 27.296875 \r\n",
       "Q 45.40625 37.203125 41.296875 42.84375 \r\n",
       "Q 37.203125 48.484375 30.078125 48.484375 \r\n",
       "Q 22.953125 48.484375 18.875 42.84375 \r\n",
       "Q 14.796875 37.203125 14.796875 27.296875 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-100\"/>\r\n",
       "       <path d=\"M 56.203125 29.59375 \r\n",
       "L 56.203125 25.203125 \r\n",
       "L 14.890625 25.203125 \r\n",
       "Q 15.484375 15.921875 20.484375 11.0625 \r\n",
       "Q 25.484375 6.203125 34.421875 6.203125 \r\n",
       "Q 39.59375 6.203125 44.453125 7.46875 \r\n",
       "Q 49.3125 8.734375 54.109375 11.28125 \r\n",
       "L 54.109375 2.78125 \r\n",
       "Q 49.265625 0.734375 44.1875 -0.34375 \r\n",
       "Q 39.109375 -1.421875 33.890625 -1.421875 \r\n",
       "Q 20.796875 -1.421875 13.15625 6.1875 \r\n",
       "Q 5.515625 13.8125 5.515625 26.8125 \r\n",
       "Q 5.515625 40.234375 12.765625 48.109375 \r\n",
       "Q 20.015625 56 32.328125 56 \r\n",
       "Q 43.359375 56 49.78125 48.890625 \r\n",
       "Q 56.203125 41.796875 56.203125 29.59375 \r\n",
       "z\r\n",
       "M 47.21875 32.234375 \r\n",
       "Q 47.125 39.59375 43.09375 43.984375 \r\n",
       "Q 39.0625 48.390625 32.421875 48.390625 \r\n",
       "Q 24.90625 48.390625 20.390625 44.140625 \r\n",
       "Q 15.875 39.890625 15.1875 32.171875 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-101\"/>\r\n",
       "       <path d=\"M 9.421875 75.984375 \r\n",
       "L 18.40625 75.984375 \r\n",
       "L 18.40625 0 \r\n",
       "L 9.421875 0 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-108\"/>\r\n",
       "      </defs>\r\n",
       "      <use xlink:href=\"#DejaVuSans-72\"/>\r\n",
       "      <use x=\"75.195312\" xlink:href=\"#DejaVuSans-105\"/>\r\n",
       "      <use x=\"102.978516\" xlink:href=\"#DejaVuSans-7879\"/>\r\n",
       "      <use x=\"164.501953\" xlink:href=\"#DejaVuSans-117\"/>\r\n",
       "      <use x=\"227.880859\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"259.667969\" xlink:href=\"#DejaVuSans-7913\"/>\r\n",
       "      <use x=\"323.046875\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"386.425781\" xlink:href=\"#DejaVuSans-103\"/>\r\n",
       "      <use x=\"449.902344\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"481.689453\" xlink:href=\"#DejaVuSans-100\"/>\r\n",
       "      <use x=\"545.166016\" xlink:href=\"#DejaVuSans-101\"/>\r\n",
       "      <use x=\"606.689453\" xlink:href=\"#DejaVuSans-108\"/>\r\n",
       "      <use x=\"634.472656\" xlink:href=\"#DejaVuSans-116\"/>\r\n",
       "      <use x=\"673.681641\" xlink:href=\"#DejaVuSans-97\"/>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "   </g>\r\n",
       "   <g id=\"matplotlib.axis_6\">\r\n",
       "    <g id=\"ytick_13\">\r\n",
       "     <g id=\"line2d_33\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"519.405554\" xlink:href=\"#m6a8762d578\" y=\"180.542055\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_28\">\r\n",
       "      <!-- 0 -->\r\n",
       "      <g transform=\"translate(506.043054 184.341273)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_14\">\r\n",
       "     <g id=\"line2d_34\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"519.405554\" xlink:href=\"#m6a8762d578\" y=\"153.919261\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_29\">\r\n",
       "      <!-- 25 -->\r\n",
       "      <g transform=\"translate(499.680554 157.718479)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-50\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_15\">\r\n",
       "     <g id=\"line2d_35\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"519.405554\" xlink:href=\"#m6a8762d578\" y=\"127.296467\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_30\">\r\n",
       "      <!-- 50 -->\r\n",
       "      <g transform=\"translate(499.680554 131.095685)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_16\">\r\n",
       "     <g id=\"line2d_36\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"519.405554\" xlink:href=\"#m6a8762d578\" y=\"100.673673\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_31\">\r\n",
       "      <!-- 75 -->\r\n",
       "      <g transform=\"translate(499.680554 104.472891)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-55\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_17\">\r\n",
       "     <g id=\"line2d_37\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"519.405554\" xlink:href=\"#m6a8762d578\" y=\"74.050879\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_32\">\r\n",
       "      <!-- 100 -->\r\n",
       "      <g transform=\"translate(493.318054 77.850097)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-49\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "       <use x=\"127.246094\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_18\">\r\n",
       "     <g id=\"line2d_38\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"519.405554\" xlink:href=\"#m6a8762d578\" y=\"47.428085\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_33\">\r\n",
       "      <!-- 125 -->\r\n",
       "      <g transform=\"translate(493.318054 51.227303)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-49\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-50\"/>\r\n",
       "       <use x=\"127.246094\" xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"text_34\">\r\n",
       "     <!-- Cỡ mẫu ước tính -->\r\n",
       "     <g transform=\"translate(487.238366 151.90659)rotate(-90)scale(0.1 -0.1)\">\r\n",
       "      <use xlink:href=\"#DejaVuSans-67\"/>\r\n",
       "      <use x=\"69.824219\" xlink:href=\"#DejaVuSans-7905\"/>\r\n",
       "      <use x=\"131.005859\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"162.792969\" xlink:href=\"#DejaVuSans-109\"/>\r\n",
       "      <use x=\"260.205078\" xlink:href=\"#DejaVuSans-7851\"/>\r\n",
       "      <use x=\"321.484375\" xlink:href=\"#DejaVuSans-117\"/>\r\n",
       "      <use x=\"384.863281\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"416.650391\" xlink:href=\"#DejaVuSans-432\"/>\r\n",
       "      <use x=\"480.029297\" xlink:href=\"#DejaVuSans-7899\"/>\r\n",
       "      <use x=\"541.210938\" xlink:href=\"#DejaVuSans-99\"/>\r\n",
       "      <use x=\"596.191406\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"627.978516\" xlink:href=\"#DejaVuSans-116\"/>\r\n",
       "      <use x=\"667.1875\" xlink:href=\"#DejaVuSans-237\"/>\r\n",
       "      <use x=\"694.970703\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"758.349609\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_21\">\r\n",
       "    <path clip-path=\"url(#pb0fba2eb70)\" d=\"M 612.053036 180.542055 \r\n",
       "L 612.053036 41.100812 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_22\">\r\n",
       "    <path clip-path=\"url(#pb0fba2eb70)\" d=\"M 527.828052 126.639134 \r\n",
       "L 696.27802 126.639134 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_23\">\r\n",
       "    <path clip-path=\"url(#pb0fba2eb70)\" d=\"M 612.053036 180.542055 \r\n",
       "L 612.053036 67.790933 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_24\">\r\n",
       "    <path clip-path=\"url(#pb0fba2eb70)\" d=\"M 527.828052 126.639134 \r\n",
       "L 696.27802 126.639134 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_25\">\r\n",
       "    <path clip-path=\"url(#pb0fba2eb70)\" d=\"M 612.053036 180.542055 \r\n",
       "L 612.053036 96.318741 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_26\">\r\n",
       "    <path clip-path=\"url(#pb0fba2eb70)\" d=\"M 527.828052 126.639134 \r\n",
       "L 696.27802 126.639134 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_27\">\r\n",
       "    <path clip-path=\"url(#pb0fba2eb70)\" d=\"M 612.053036 180.542055 \r\n",
       "L 612.053036 106.067862 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_28\">\r\n",
       "    <path clip-path=\"url(#pb0fba2eb70)\" d=\"M 527.828052 126.639134 \r\n",
       "L 696.27802 126.639134 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_29\">\r\n",
       "    <path clip-path=\"url(#pb0fba2eb70)\" d=\"M 612.053036 180.542055 \r\n",
       "L 612.053036 114.311975 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_30\">\r\n",
       "    <path clip-path=\"url(#pb0fba2eb70)\" d=\"M 527.828052 126.639134 \r\n",
       "L 696.27802 126.639134 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_39\">\r\n",
       "    <path clip-path=\"url(#pb0fba2eb70)\" d=\"M 527.828052 41.100812 \r\n",
       "L 531.265807 43.90358 \r\n",
       "L 534.703561 46.622685 \r\n",
       "L 538.141315 49.261426 \r\n",
       "L 541.57907 51.822938 \r\n",
       "L 545.016824 54.310205 \r\n",
       "L 548.454579 56.72607 \r\n",
       "L 551.892333 59.073239 \r\n",
       "L 555.330088 61.354293 \r\n",
       "L 558.767842 63.571691 \r\n",
       "L 562.205596 65.727781 \r\n",
       "L 565.643351 67.824801 \r\n",
       "L 569.081105 69.86489 \r\n",
       "L 572.51886 71.85009 \r\n",
       "L 575.956614 73.782353 \r\n",
       "L 579.394369 75.663545 \r\n",
       "L 582.832123 77.495449 \r\n",
       "L 586.269878 79.279772 \r\n",
       "L 589.707632 81.018148 \r\n",
       "L 593.145386 82.712141 \r\n",
       "L 596.583141 84.363249 \r\n",
       "L 600.020895 85.972907 \r\n",
       "L 603.45865 87.542493 \r\n",
       "L 606.896404 89.073323 \r\n",
       "L 610.334159 90.566665 \r\n",
       "L 613.771913 92.023733 \r\n",
       "L 617.209668 93.445691 \r\n",
       "L 620.647422 94.833658 \r\n",
       "L 624.085176 96.18871 \r\n",
       "L 627.522931 97.51188 \r\n",
       "L 630.960685 98.804158 \r\n",
       "L 634.39844 100.066501 \r\n",
       "L 637.836194 101.299824 \r\n",
       "L 641.273949 102.505012 \r\n",
       "L 644.711703 103.682912 \r\n",
       "L 648.149457 104.834344 \r\n",
       "L 651.587212 105.960094 \r\n",
       "L 655.024966 107.060919 \r\n",
       "L 658.462721 108.137551 \r\n",
       "L 661.900475 109.190694 \r\n",
       "L 665.33823 110.221025 \r\n",
       "L 668.775984 111.229198 \r\n",
       "L 672.213739 112.215846 \r\n",
       "L 675.651493 113.181575 \r\n",
       "L 679.089247 114.126974 \r\n",
       "L 682.527002 115.052608 \r\n",
       "L 685.964756 115.959025 \r\n",
       "L 689.402511 116.846754 \r\n",
       "L 692.840265 117.716304 \r\n",
       "L 696.27802 118.568169 \r\n",
       "\" style=\"fill:none;stroke:#1f77b4;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_40\">\r\n",
       "    <path clip-path=\"url(#pb0fba2eb70)\" d=\"M 527.828052 67.790933 \r\n",
       "L 531.265807 70.05723 \r\n",
       "L 534.703561 72.255878 \r\n",
       "L 538.141315 74.389543 \r\n",
       "L 541.57907 76.460762 \r\n",
       "L 545.016824 78.471947 \r\n",
       "L 548.454579 80.425397 \r\n",
       "L 551.892333 82.3233 \r\n",
       "L 555.330088 84.167743 \r\n",
       "L 558.767842 85.960714 \r\n",
       "L 562.205596 87.704111 \r\n",
       "L 565.643351 89.399746 \r\n",
       "L 569.081105 91.049346 \r\n",
       "L 572.51886 92.654564 \r\n",
       "L 575.956614 94.216977 \r\n",
       "L 579.394369 95.738094 \r\n",
       "L 582.832123 97.219358 \r\n",
       "L 586.269878 98.662148 \r\n",
       "L 589.707632 100.067785 \r\n",
       "L 593.145386 101.437535 \r\n",
       "L 596.583141 102.772608 \r\n",
       "L 600.020895 104.074166 \r\n",
       "L 603.45865 105.343321 \r\n",
       "L 606.896404 106.581139 \r\n",
       "L 610.334159 107.788644 \r\n",
       "L 613.771913 108.966817 \r\n",
       "L 617.209668 110.116601 \r\n",
       "L 620.647422 111.238901 \r\n",
       "L 624.085176 112.334586 \r\n",
       "L 627.522931 113.404491 \r\n",
       "L 630.960685 114.449417 \r\n",
       "L 634.39844 115.470138 \r\n",
       "L 637.836194 116.467394 \r\n",
       "L 641.273949 117.441899 \r\n",
       "L 644.711703 118.394341 \r\n",
       "L 648.149457 119.325379 \r\n",
       "L 651.587212 120.235652 \r\n",
       "L 655.024966 121.125771 \r\n",
       "L 658.462721 121.996327 \r\n",
       "L 661.900475 122.84789 \r\n",
       "L 665.33823 123.681008 \r\n",
       "L 668.775984 124.49621 \r\n",
       "L 672.213739 125.294005 \r\n",
       "L 675.651493 126.074886 \r\n",
       "L 679.089247 126.839328 \r\n",
       "L 682.527002 127.587789 \r\n",
       "L 685.964756 128.320712 \r\n",
       "L 689.402511 129.038522 \r\n",
       "L 692.840265 129.741634 \r\n",
       "L 696.27802 130.430445 \r\n",
       "\" style=\"fill:none;stroke:#ff7f0e;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_41\">\r\n",
       "    <path clip-path=\"url(#pb0fba2eb70)\" d=\"M 527.828052 96.318741 \r\n",
       "L 531.265807 98.011628 \r\n",
       "L 534.703561 99.653984 \r\n",
       "L 538.141315 101.247798 \r\n",
       "L 541.57907 102.794966 \r\n",
       "L 545.016824 104.29729 \r\n",
       "L 548.454579 105.756486 \r\n",
       "L 551.892333 107.17419 \r\n",
       "L 555.330088 108.55196 \r\n",
       "L 558.767842 109.891281 \r\n",
       "L 562.205596 111.193571 \r\n",
       "L 565.643351 112.460184 \r\n",
       "L 569.081105 113.692409 \r\n",
       "L 572.51886 114.891482 \r\n",
       "L 575.956614 116.05858 \r\n",
       "L 579.394369 117.19483 \r\n",
       "L 582.832123 118.301311 \r\n",
       "L 586.269878 119.379052 \r\n",
       "L 589.707632 120.429041 \r\n",
       "L 593.145386 121.452223 \r\n",
       "L 596.583141 122.449502 \r\n",
       "L 600.020895 123.421745 \r\n",
       "L 603.45865 124.369783 \r\n",
       "L 606.896404 125.294414 \r\n",
       "L 610.334159 126.196401 \r\n",
       "L 613.771913 127.076478 \r\n",
       "L 617.209668 127.935349 \r\n",
       "L 620.647422 128.773689 \r\n",
       "L 624.085176 129.592149 \r\n",
       "L 627.522931 130.39135 \r\n",
       "L 630.960685 131.171894 \r\n",
       "L 634.39844 131.934356 \r\n",
       "L 637.836194 132.679291 \r\n",
       "L 641.273949 133.407231 \r\n",
       "L 644.711703 134.11869 \r\n",
       "L 648.149457 134.814161 \r\n",
       "L 651.587212 135.49412 \r\n",
       "L 655.024966 136.159025 \r\n",
       "L 658.462721 136.809317 \r\n",
       "L 661.900475 137.445421 \r\n",
       "L 665.33823 138.067747 \r\n",
       "L 668.775984 138.67669 \r\n",
       "L 672.213739 139.272631 \r\n",
       "L 675.651493 139.855937 \r\n",
       "L 679.089247 140.426963 \r\n",
       "L 682.527002 140.986051 \r\n",
       "L 685.964756 141.533533 \r\n",
       "L 689.402511 142.069726 \r\n",
       "L 692.840265 142.594939 \r\n",
       "L 696.27802 143.109471 \r\n",
       "\" style=\"fill:none;stroke:#2ca02c;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_42\">\r\n",
       "    <path clip-path=\"url(#pb0fba2eb70)\" d=\"M 527.828052 106.067862 \r\n",
       "L 531.265807 107.564792 \r\n",
       "L 534.703561 109.01704 \r\n",
       "L 538.141315 110.426365 \r\n",
       "L 541.57907 111.794443 \r\n",
       "L 545.016824 113.122868 \r\n",
       "L 548.454579 114.413158 \r\n",
       "L 551.892333 115.666758 \r\n",
       "L 555.330088 116.885046 \r\n",
       "L 558.767842 118.069337 \r\n",
       "L 562.205596 119.220883 \r\n",
       "L 565.643351 120.340881 \r\n",
       "L 569.081105 121.430472 \r\n",
       "L 572.51886 122.490748 \r\n",
       "L 575.956614 123.522751 \r\n",
       "L 579.394369 124.527477 \r\n",
       "L 582.832123 125.505878 \r\n",
       "L 586.269878 126.458868 \r\n",
       "L 589.707632 127.387317 \r\n",
       "L 593.145386 128.292062 \r\n",
       "L 596.583141 129.173903 \r\n",
       "L 600.020895 130.033606 \r\n",
       "L 603.45865 130.871906 \r\n",
       "L 606.896404 131.689507 \r\n",
       "L 610.334159 132.487086 \r\n",
       "L 613.771913 133.265292 \r\n",
       "L 617.209668 134.024745 \r\n",
       "L 620.647422 134.766045 \r\n",
       "L 624.085176 135.489765 \r\n",
       "L 627.522931 136.196457 \r\n",
       "L 630.960685 136.88665 \r\n",
       "L 634.39844 137.560855 \r\n",
       "L 637.836194 138.219561 \r\n",
       "L 641.273949 138.86324 \r\n",
       "L 644.711703 139.492345 \r\n",
       "L 648.149457 140.107313 \r\n",
       "L 651.587212 140.708565 \r\n",
       "L 655.024966 141.296505 \r\n",
       "L 658.462721 141.871523 \r\n",
       "L 661.900475 142.433996 \r\n",
       "L 665.33823 142.984286 \r\n",
       "L 668.775984 143.522742 \r\n",
       "L 672.213739 144.0497 \r\n",
       "L 675.651493 144.565487 \r\n",
       "L 679.089247 145.070415 \r\n",
       "L 682.527002 145.564787 \r\n",
       "L 685.964756 146.048896 \r\n",
       "L 689.402511 146.523023 \r\n",
       "L 692.840265 146.987441 \r\n",
       "L 696.27802 147.442413 \r\n",
       "\" style=\"fill:none;stroke:#d62728;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_43\">\r\n",
       "    <path clip-path=\"url(#pb0fba2eb70)\" d=\"M 527.828052 114.311975 \r\n",
       "L 531.265807 115.643198 \r\n",
       "L 534.703561 116.934686 \r\n",
       "L 538.141315 118.188002 \r\n",
       "L 541.57907 119.404637 \r\n",
       "L 545.016824 120.586009 \r\n",
       "L 548.454579 121.733466 \r\n",
       "L 551.892333 122.848296 \r\n",
       "L 555.330088 123.931723 \r\n",
       "L 558.767842 124.984915 \r\n",
       "L 562.205596 126.008988 \r\n",
       "L 565.643351 127.005005 \r\n",
       "L 569.081105 127.973981 \r\n",
       "L 572.51886 128.916887 \r\n",
       "L 575.956614 129.83465 \r\n",
       "L 579.394369 130.728155 \r\n",
       "L 582.832123 131.59825 \r\n",
       "L 586.269878 132.445745 \r\n",
       "L 589.707632 133.271418 \r\n",
       "L 593.145386 134.07601 \r\n",
       "L 596.583141 134.860233 \r\n",
       "L 600.020895 135.624768 \r\n",
       "L 603.45865 136.370271 \r\n",
       "L 606.896404 137.097366 \r\n",
       "L 610.334159 137.806655 \r\n",
       "L 613.771913 138.498715 \r\n",
       "L 617.209668 139.174099 \r\n",
       "L 620.647422 139.833338 \r\n",
       "L 624.085176 140.476944 \r\n",
       "L 627.522931 141.105407 \r\n",
       "L 630.960685 141.719198 \r\n",
       "L 634.39844 142.318769 \r\n",
       "L 637.836194 142.904558 \r\n",
       "L 641.273949 143.476983 \r\n",
       "L 644.711703 144.036448 \r\n",
       "L 648.149457 144.583341 \r\n",
       "L 651.587212 145.118035 \r\n",
       "L 655.024966 145.640892 \r\n",
       "L 658.462721 146.152257 \r\n",
       "L 661.900475 146.652466 \r\n",
       "L 665.33823 147.14184 \r\n",
       "L 668.775984 147.62069 \r\n",
       "L 672.213739 148.089315 \r\n",
       "L 675.651493 148.548006 \r\n",
       "L 679.089247 148.997039 \r\n",
       "L 682.527002 149.436686 \r\n",
       "L 685.964756 149.867205 \r\n",
       "L 689.402511 150.288847 \r\n",
       "L 692.840265 150.701855 \r\n",
       "L 696.27802 151.106463 \r\n",
       "\" style=\"fill:none;stroke:#9467bd;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_13\">\r\n",
       "    <path d=\"M 519.405554 187.514117 \r\n",
       "L 519.405554 34.12875 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_14\">\r\n",
       "    <path d=\"M 704.700518 187.514117 \r\n",
       "L 704.700518 34.12875 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_15\">\r\n",
       "    <path d=\"M 519.405554 187.514117 \r\n",
       "L 704.700518 187.514117 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_16\">\r\n",
       "    <path d=\"M 519.405554 34.12875 \r\n",
       "L 704.700518 34.12875 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "  </g>\r\n",
       "  <g id=\"axes_4\">\r\n",
       "   <g id=\"patch_17\">\r\n",
       "    <path d=\"M 46.965625 386.85375 \r\n",
       "L 232.260589 386.85375 \r\n",
       "L 232.260589 233.468383 \r\n",
       "L 46.965625 233.468383 \r\n",
       "z\r\n",
       "\" style=\"fill:#ffffff;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"matplotlib.axis_7\">\r\n",
       "    <g id=\"xtick_11\">\r\n",
       "     <g id=\"line2d_44\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"65.414907\" xlink:href=\"#mc4737e2393\" y=\"386.85375\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_35\">\r\n",
       "      <!-- 2 -->\r\n",
       "      <g transform=\"translate(62.233657 401.452187)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-50\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"xtick_12\">\r\n",
       "     <g id=\"line2d_45\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"105.522042\" xlink:href=\"#mc4737e2393\" y=\"386.85375\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_36\">\r\n",
       "      <!-- 3 -->\r\n",
       "      <g transform=\"translate(102.340792 401.452187)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-51\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"xtick_13\">\r\n",
       "     <g id=\"line2d_46\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"145.629177\" xlink:href=\"#mc4737e2393\" y=\"386.85375\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_37\">\r\n",
       "      <!-- 4 -->\r\n",
       "      <g transform=\"translate(142.447927 401.452187)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-52\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"xtick_14\">\r\n",
       "     <g id=\"line2d_47\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"185.736313\" xlink:href=\"#mc4737e2393\" y=\"386.85375\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_38\">\r\n",
       "      <!-- 5 -->\r\n",
       "      <g transform=\"translate(182.555063 401.452187)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"xtick_15\">\r\n",
       "     <g id=\"line2d_48\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"225.843448\" xlink:href=\"#mc4737e2393\" y=\"386.85375\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_39\">\r\n",
       "      <!-- 6 -->\r\n",
       "      <g transform=\"translate(222.662198 401.452187)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-54\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"text_40\">\r\n",
       "     <!-- Độ lệch chuẩn thay đổi nhóm chứng -->\r\n",
       "     <g transform=\"translate(48.970138 416.15375)scale(0.1 -0.1)\">\r\n",
       "      <defs>\r\n",
       "       <path d=\"M 10.296875 72.90625 \r\n",
       "L 30.609375 72.90625 \r\n",
       "Q 51.765625 72.90625 61.671875 64.09375 \r\n",
       "Q 71.578125 55.28125 71.578125 36.53125 \r\n",
       "Q 71.578125 17.671875 61.640625 8.828125 \r\n",
       "Q 51.703125 0 30.609375 0 \r\n",
       "L 10.296875 0 \r\n",
       "L 10.296875 34.1875 \r\n",
       "L 0.484375 34.1875 \r\n",
       "L 0.484375 41.21875 \r\n",
       "L 10.296875 41.21875 \r\n",
       "z\r\n",
       "M 20.21875 64.796875 \r\n",
       "L 20.21875 41.21875 \r\n",
       "L 36.625 41.21875 \r\n",
       "L 36.625 34.1875 \r\n",
       "L 20.21875 34.1875 \r\n",
       "L 20.21875 8.109375 \r\n",
       "L 32.078125 8.109375 \r\n",
       "Q 47.171875 8.109375 54.171875 14.9375 \r\n",
       "Q 61.1875 21.78125 61.1875 36.53125 \r\n",
       "Q 61.1875 51.171875 54.171875 57.984375 \r\n",
       "Q 47.171875 64.796875 32.078125 64.796875 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-272\"/>\r\n",
       "       <path d=\"M 26.03125 -6.890625 \r\n",
       "L 35.015625 -6.890625 \r\n",
       "L 35.015625 -18.3125 \r\n",
       "L 26.03125 -18.3125 \r\n",
       "z\r\n",
       "M 30.609375 48.390625 \r\n",
       "Q 23.390625 48.390625 19.1875 42.75 \r\n",
       "Q 14.984375 37.109375 14.984375 27.296875 \r\n",
       "Q 14.984375 17.484375 19.15625 11.84375 \r\n",
       "Q 23.34375 6.203125 30.609375 6.203125 \r\n",
       "Q 37.796875 6.203125 41.984375 11.859375 \r\n",
       "Q 46.1875 17.53125 46.1875 27.296875 \r\n",
       "Q 46.1875 37.015625 41.984375 42.703125 \r\n",
       "Q 37.796875 48.390625 30.609375 48.390625 \r\n",
       "z\r\n",
       "M 30.609375 56 \r\n",
       "Q 42.328125 56 49.015625 48.375 \r\n",
       "Q 55.71875 40.765625 55.71875 27.296875 \r\n",
       "Q 55.71875 13.875 49.015625 6.21875 \r\n",
       "Q 42.328125 -1.421875 30.609375 -1.421875 \r\n",
       "Q 18.84375 -1.421875 12.171875 6.21875 \r\n",
       "Q 5.515625 13.875 5.515625 27.296875 \r\n",
       "Q 5.515625 40.765625 12.171875 48.375 \r\n",
       "Q 18.84375 56 30.609375 56 \r\n",
       "z\r\n",
       "M 26.03125 -6.890625 \r\n",
       "L 35.015625 -6.890625 \r\n",
       "L 35.015625 -18.3125 \r\n",
       "L 26.03125 -18.3125 \r\n",
       "z\r\n",
       "M 27 79.984375 \r\n",
       "L 34.234375 79.984375 \r\n",
       "L 46.1875 61.625 \r\n",
       "L 39.40625 61.625 \r\n",
       "L 30.609375 73.578125 \r\n",
       "L 21.828125 61.625 \r\n",
       "L 15.046875 61.625 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-7897\"/>\r\n",
       "       <path d=\"M 35.796875 83.734375 \r\n",
       "Q 41.265625 86.21875 46.390625 86.21875 \r\n",
       "Q 51.46875 86.21875 54.5625 84.140625 \r\n",
       "Q 57.671875 82.078125 57.671875 78.796875 \r\n",
       "Q 57.671875 75.828125 53.375 72.65625 \r\n",
       "L 51.21875 71.09375 \r\n",
       "Q 49.515625 69.8125 49.3125 69.375 \r\n",
       "Q 48.96875 68.59375 48.96875 67.03125 \r\n",
       "L 43.171875 67.03125 \r\n",
       "L 43.171875 67.625 \r\n",
       "Q 43.171875 69.578125 43.890625 70.890625 \r\n",
       "Q 44.625 72.21875 47.125 74.015625 \r\n",
       "L 49.3125 75.671875 \r\n",
       "Q 51.5625 77.34375 51.5625 79.296875 \r\n",
       "Q 51.5625 80.3125 50.046875 81.1875 \r\n",
       "Q 48.53125 82.078125 45.0625 82.078125 \r\n",
       "Q 40.671875 82.078125 35.796875 79.53125 \r\n",
       "z\r\n",
       "M 24.421875 74.609375 \r\n",
       "L 33.59375 74.609375 \r\n",
       "L 43.890625 61.625 \r\n",
       "L 37.109375 61.625 \r\n",
       "L 29 70.3125 \r\n",
       "L 20.90625 61.625 \r\n",
       "L 14.109375 61.625 \r\n",
       "z\r\n",
       "M 34.28125 27.484375 \r\n",
       "Q 23.390625 27.484375 19.1875 25 \r\n",
       "Q 14.984375 22.515625 14.984375 16.5 \r\n",
       "Q 14.984375 11.71875 18.140625 8.90625 \r\n",
       "Q 21.296875 6.109375 26.703125 6.109375 \r\n",
       "Q 34.1875 6.109375 38.703125 11.40625 \r\n",
       "Q 43.21875 16.703125 43.21875 25.484375 \r\n",
       "L 43.21875 27.484375 \r\n",
       "z\r\n",
       "M 52.203125 31.203125 \r\n",
       "L 52.203125 0 \r\n",
       "L 43.21875 0 \r\n",
       "L 43.21875 8.296875 \r\n",
       "Q 40.140625 3.328125 35.546875 0.953125 \r\n",
       "Q 30.953125 -1.421875 24.3125 -1.421875 \r\n",
       "Q 15.921875 -1.421875 10.953125 3.296875 \r\n",
       "Q 6 8.015625 6 15.921875 \r\n",
       "Q 6 25.140625 12.171875 29.828125 \r\n",
       "Q 18.359375 34.515625 30.609375 34.515625 \r\n",
       "L 43.21875 34.515625 \r\n",
       "L 43.21875 35.40625 \r\n",
       "Q 43.21875 41.609375 39.140625 45 \r\n",
       "Q 35.0625 48.390625 27.6875 48.390625 \r\n",
       "Q 23 48.390625 18.546875 47.265625 \r\n",
       "Q 14.109375 46.140625 10.015625 43.890625 \r\n",
       "L 10.015625 52.203125 \r\n",
       "Q 14.9375 54.109375 19.578125 55.046875 \r\n",
       "Q 24.21875 56 28.609375 56 \r\n",
       "Q 40.484375 56 46.34375 49.84375 \r\n",
       "Q 52.203125 43.703125 52.203125 31.203125 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-7849\"/>\r\n",
       "      </defs>\r\n",
       "      <use xlink:href=\"#DejaVuSans-272\"/>\r\n",
       "      <use x=\"77.490234\" xlink:href=\"#DejaVuSans-7897\"/>\r\n",
       "      <use x=\"138.671875\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"170.458984\" xlink:href=\"#DejaVuSans-108\"/>\r\n",
       "      <use x=\"198.242188\" xlink:href=\"#DejaVuSans-7879\"/>\r\n",
       "      <use x=\"259.765625\" xlink:href=\"#DejaVuSans-99\"/>\r\n",
       "      <use x=\"314.746094\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "      <use x=\"378.125\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"409.912109\" xlink:href=\"#DejaVuSans-99\"/>\r\n",
       "      <use x=\"464.892578\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "      <use x=\"528.271484\" xlink:href=\"#DejaVuSans-117\"/>\r\n",
       "      <use x=\"591.650391\" xlink:href=\"#DejaVuSans-7849\"/>\r\n",
       "      <use x=\"652.929688\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"716.308594\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"748.095703\" xlink:href=\"#DejaVuSans-116\"/>\r\n",
       "      <use x=\"787.304688\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "      <use x=\"850.683594\" xlink:href=\"#DejaVuSans-97\"/>\r\n",
       "      <use x=\"911.962891\" xlink:href=\"#DejaVuSans-121\"/>\r\n",
       "      <use x=\"971.142578\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"1002.929688\" xlink:href=\"#DejaVuSans-273\"/>\r\n",
       "      <use x=\"1066.40625\" xlink:href=\"#DejaVuSans-7893\"/>\r\n",
       "      <use x=\"1127.587891\" xlink:href=\"#DejaVuSans-105\"/>\r\n",
       "      <use x=\"1155.371094\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"1187.158203\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"1250.537109\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "      <use x=\"1313.916016\" xlink:href=\"#DejaVuSans-243\"/>\r\n",
       "      <use x=\"1375.097656\" xlink:href=\"#DejaVuSans-109\"/>\r\n",
       "      <use x=\"1472.509766\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"1504.296875\" xlink:href=\"#DejaVuSans-99\"/>\r\n",
       "      <use x=\"1559.277344\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "      <use x=\"1622.65625\" xlink:href=\"#DejaVuSans-7913\"/>\r\n",
       "      <use x=\"1686.035156\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"1749.414062\" xlink:href=\"#DejaVuSans-103\"/>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "   </g>\r\n",
       "   <g id=\"matplotlib.axis_8\">\r\n",
       "    <g id=\"ytick_19\">\r\n",
       "     <g id=\"line2d_49\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"46.965625\" xlink:href=\"#m6a8762d578\" y=\"379.881688\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_41\">\r\n",
       "      <!-- 0 -->\r\n",
       "      <g transform=\"translate(33.603125 383.680907)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_20\">\r\n",
       "     <g id=\"line2d_50\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"46.965625\" xlink:href=\"#m6a8762d578\" y=\"353.079216\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_42\">\r\n",
       "      <!-- 25 -->\r\n",
       "      <g transform=\"translate(27.240625 356.878434)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-50\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_21\">\r\n",
       "     <g id=\"line2d_51\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"46.965625\" xlink:href=\"#m6a8762d578\" y=\"326.276743\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_43\">\r\n",
       "      <!-- 50 -->\r\n",
       "      <g transform=\"translate(27.240625 330.075962)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_22\">\r\n",
       "     <g id=\"line2d_52\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"46.965625\" xlink:href=\"#m6a8762d578\" y=\"299.474271\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_44\">\r\n",
       "      <!-- 75 -->\r\n",
       "      <g transform=\"translate(27.240625 303.27349)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-55\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_23\">\r\n",
       "     <g id=\"line2d_53\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"46.965625\" xlink:href=\"#m6a8762d578\" y=\"272.671799\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_45\">\r\n",
       "      <!-- 100 -->\r\n",
       "      <g transform=\"translate(20.878125 276.471017)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-49\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "       <use x=\"127.246094\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_24\">\r\n",
       "     <g id=\"line2d_54\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"46.965625\" xlink:href=\"#m6a8762d578\" y=\"245.869326\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_46\">\r\n",
       "      <!-- 125 -->\r\n",
       "      <g transform=\"translate(20.878125 249.668545)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-49\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-50\"/>\r\n",
       "       <use x=\"127.246094\" xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"text_47\">\r\n",
       "     <!-- Cỡ mẫu ước tính -->\r\n",
       "     <g transform=\"translate(14.798437 351.246223)rotate(-90)scale(0.1 -0.1)\">\r\n",
       "      <use xlink:href=\"#DejaVuSans-67\"/>\r\n",
       "      <use x=\"69.824219\" xlink:href=\"#DejaVuSans-7905\"/>\r\n",
       "      <use x=\"131.005859\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"162.792969\" xlink:href=\"#DejaVuSans-109\"/>\r\n",
       "      <use x=\"260.205078\" xlink:href=\"#DejaVuSans-7851\"/>\r\n",
       "      <use x=\"321.484375\" xlink:href=\"#DejaVuSans-117\"/>\r\n",
       "      <use x=\"384.863281\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"416.650391\" xlink:href=\"#DejaVuSans-432\"/>\r\n",
       "      <use x=\"480.029297\" xlink:href=\"#DejaVuSans-7899\"/>\r\n",
       "      <use x=\"541.210938\" xlink:href=\"#DejaVuSans-99\"/>\r\n",
       "      <use x=\"596.191406\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"627.978516\" xlink:href=\"#DejaVuSans-116\"/>\r\n",
       "      <use x=\"667.1875\" xlink:href=\"#DejaVuSans-237\"/>\r\n",
       "      <use x=\"694.970703\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"758.349609\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_31\">\r\n",
       "    <path clip-path=\"url(#p87f20bf072)\" d=\"M 125.57561 379.881688 \r\n",
       "L 125.57561 240.440445 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_32\">\r\n",
       "    <path clip-path=\"url(#p87f20bf072)\" d=\"M 55.388123 325.614974 \r\n",
       "L 223.838091 325.614974 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_33\">\r\n",
       "    <path clip-path=\"url(#p87f20bf072)\" d=\"M 125.57561 379.881688 \r\n",
       "L 125.57561 267.130566 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_34\">\r\n",
       "    <path clip-path=\"url(#p87f20bf072)\" d=\"M 55.388123 325.614974 \r\n",
       "L 223.838091 325.614974 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_35\">\r\n",
       "    <path clip-path=\"url(#p87f20bf072)\" d=\"M 125.57561 379.881688 \r\n",
       "L 125.57561 295.658374 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_36\">\r\n",
       "    <path clip-path=\"url(#p87f20bf072)\" d=\"M 55.388123 325.614974 \r\n",
       "L 223.838091 325.614974 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_37\">\r\n",
       "    <path clip-path=\"url(#p87f20bf072)\" d=\"M 125.57561 379.881688 \r\n",
       "L 125.57561 305.407495 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_38\">\r\n",
       "    <path clip-path=\"url(#p87f20bf072)\" d=\"M 55.388123 325.614974 \r\n",
       "L 223.838091 325.614974 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_39\">\r\n",
       "    <path clip-path=\"url(#p87f20bf072)\" d=\"M 125.57561 379.881688 \r\n",
       "L 125.57561 313.651608 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_40\">\r\n",
       "    <path clip-path=\"url(#p87f20bf072)\" d=\"M 55.388123 325.614974 \r\n",
       "L 223.838091 325.614974 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_55\">\r\n",
       "    <path clip-path=\"url(#p87f20bf072)\" d=\"M 55.388123 292.027223 \r\n",
       "L 58.825878 292.578685 \r\n",
       "L 62.263632 293.063303 \r\n",
       "L 65.701387 293.481077 \r\n",
       "L 69.139141 293.832008 \r\n",
       "L 72.576896 294.116094 \r\n",
       "L 76.01465 294.333337 \r\n",
       "L 79.452404 294.483736 \r\n",
       "L 82.890159 294.567291 \r\n",
       "L 86.327913 294.584002 \r\n",
       "L 89.765668 294.533869 \r\n",
       "L 93.203422 294.416892 \r\n",
       "L 96.641177 294.233071 \r\n",
       "L 100.078931 293.982407 \r\n",
       "L 103.516686 293.664898 \r\n",
       "L 106.95444 293.280546 \r\n",
       "L 110.392194 292.829349 \r\n",
       "L 113.829949 292.311309 \r\n",
       "L 117.267703 291.726425 \r\n",
       "L 120.705458 291.074697 \r\n",
       "L 124.143212 290.356125 \r\n",
       "L 127.580967 289.570709 \r\n",
       "L 131.018721 288.71845 \r\n",
       "L 134.456476 287.799346 \r\n",
       "L 137.89423 286.813399 \r\n",
       "L 141.331984 285.760607 \r\n",
       "L 144.769739 284.640972 \r\n",
       "L 148.207493 283.454493 \r\n",
       "L 151.645248 282.20117 \r\n",
       "L 155.083002 280.881003 \r\n",
       "L 158.520757 279.493992 \r\n",
       "L 161.958511 278.040137 \r\n",
       "L 165.396265 276.519439 \r\n",
       "L 168.83402 274.931896 \r\n",
       "L 172.271774 273.27751 \r\n",
       "L 175.709529 271.556279 \r\n",
       "L 179.147283 269.768205 \r\n",
       "L 182.585038 267.913287 \r\n",
       "L 186.022792 265.991525 \r\n",
       "L 189.460547 264.002919 \r\n",
       "L 192.898301 261.947469 \r\n",
       "L 196.336055 259.825175 \r\n",
       "L 199.77381 257.636038 \r\n",
       "L 203.211564 255.380056 \r\n",
       "L 206.649319 253.057231 \r\n",
       "L 210.087073 250.667562 \r\n",
       "L 213.524828 248.211048 \r\n",
       "L 216.962582 245.687691 \r\n",
       "L 220.400337 243.09749 \r\n",
       "L 223.838091 240.440445 \r\n",
       "\" style=\"fill:none;stroke:#1f77b4;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_56\">\r\n",
       "    <path clip-path=\"url(#p87f20bf072)\" d=\"M 55.388123 308.84324 \r\n",
       "L 58.825878 309.289148 \r\n",
       "L 62.263632 309.681006 \r\n",
       "L 65.701387 310.018816 \r\n",
       "L 69.139141 310.302575 \r\n",
       "L 72.576896 310.532285 \r\n",
       "L 76.01465 310.707946 \r\n",
       "L 79.452404 310.829557 \r\n",
       "L 82.890159 310.897119 \r\n",
       "L 86.327913 310.910632 \r\n",
       "L 89.765668 310.870095 \r\n",
       "L 93.203422 310.775508 \r\n",
       "L 96.641177 310.626872 \r\n",
       "L 100.078931 310.424186 \r\n",
       "L 103.516686 310.167452 \r\n",
       "L 106.95444 309.856667 \r\n",
       "L 110.392194 309.491833 \r\n",
       "L 113.829949 309.07295 \r\n",
       "L 117.267703 308.600017 \r\n",
       "L 120.705458 308.073035 \r\n",
       "L 124.143212 307.492003 \r\n",
       "L 127.580967 306.856922 \r\n",
       "L 131.018721 306.167791 \r\n",
       "L 134.456476 305.424611 \r\n",
       "L 137.89423 304.627382 \r\n",
       "L 141.331984 303.776103 \r\n",
       "L 144.769739 302.870774 \r\n",
       "L 148.207493 301.911396 \r\n",
       "L 151.645248 300.897969 \r\n",
       "L 155.083002 299.830492 \r\n",
       "L 158.520757 298.708965 \r\n",
       "L 161.958511 297.533389 \r\n",
       "L 165.396265 296.303764 \r\n",
       "L 168.83402 295.020089 \r\n",
       "L 172.271774 293.682365 \r\n",
       "L 175.709529 292.290592 \r\n",
       "L 179.147283 290.844768 \r\n",
       "L 182.585038 289.344896 \r\n",
       "L 186.022792 287.790974 \r\n",
       "L 189.460547 286.183002 \r\n",
       "L 192.898301 284.520981 \r\n",
       "L 196.336055 282.804911 \r\n",
       "L 199.77381 281.034791 \r\n",
       "L 203.211564 279.210621 \r\n",
       "L 206.649319 277.332403 \r\n",
       "L 210.087073 275.400134 \r\n",
       "L 213.524828 273.413817 \r\n",
       "L 216.962582 271.373449 \r\n",
       "L 220.400337 269.279033 \r\n",
       "L 223.838091 267.130566 \r\n",
       "\" style=\"fill:none;stroke:#ff7f0e;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_57\">\r\n",
       "    <path clip-path=\"url(#p87f20bf072)\" d=\"M 55.388123 326.817085 \r\n",
       "L 58.825878 327.150171 \r\n",
       "L 62.263632 327.442883 \r\n",
       "L 65.701387 327.695221 \r\n",
       "L 69.139141 327.907185 \r\n",
       "L 72.576896 328.078775 \r\n",
       "L 76.01465 328.209991 \r\n",
       "L 79.452404 328.300833 \r\n",
       "L 82.890159 328.3513 \r\n",
       "L 86.327913 328.361394 \r\n",
       "L 89.765668 328.331113 \r\n",
       "L 93.203422 328.260459 \r\n",
       "L 96.641177 328.14943 \r\n",
       "L 100.078931 327.998027 \r\n",
       "L 103.516686 327.80625 \r\n",
       "L 106.95444 327.574099 \r\n",
       "L 110.392194 327.301574 \r\n",
       "L 113.829949 326.988675 \r\n",
       "L 117.267703 326.635401 \r\n",
       "L 120.705458 326.241754 \r\n",
       "L 124.143212 325.807732 \r\n",
       "L 127.580967 325.333336 \r\n",
       "L 131.018721 324.818567 \r\n",
       "L 134.456476 324.263423 \r\n",
       "L 137.89423 323.667905 \r\n",
       "L 141.331984 323.032013 \r\n",
       "L 144.769739 322.355747 \r\n",
       "L 148.207493 321.639106 \r\n",
       "L 151.645248 320.882092 \r\n",
       "L 155.083002 320.084704 \r\n",
       "L 158.520757 319.246941 \r\n",
       "L 161.958511 318.368804 \r\n",
       "L 165.396265 317.450294 \r\n",
       "L 168.83402 316.491409 \r\n",
       "L 172.271774 315.49215 \r\n",
       "L 175.709529 314.452517 \r\n",
       "L 179.147283 313.37251 \r\n",
       "L 182.585038 312.252128 \r\n",
       "L 186.022792 311.091373 \r\n",
       "L 189.460547 309.890244 \r\n",
       "L 192.898301 308.64874 \r\n",
       "L 196.336055 307.366862 \r\n",
       "L 199.77381 306.044611 \r\n",
       "L 203.211564 304.681985 \r\n",
       "L 206.649319 303.278985 \r\n",
       "L 210.087073 301.835611 \r\n",
       "L 213.524828 300.351863 \r\n",
       "L 216.962582 298.827741 \r\n",
       "L 220.400337 297.263244 \r\n",
       "L 223.838091 295.658374 \r\n",
       "\" style=\"fill:none;stroke:#2ca02c;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_58\">\r\n",
       "    <path clip-path=\"url(#p87f20bf072)\" d=\"M 55.388123 332.959484 \r\n",
       "L 58.825878 333.254015 \r\n",
       "L 62.263632 333.512845 \r\n",
       "L 65.701387 333.735974 \r\n",
       "L 69.139141 333.923402 \r\n",
       "L 72.576896 334.07513 \r\n",
       "L 76.01465 334.191157 \r\n",
       "L 79.452404 334.271484 \r\n",
       "L 82.890159 334.31611 \r\n",
       "L 86.327913 334.325035 \r\n",
       "L 89.765668 334.298259 \r\n",
       "L 93.203422 334.235783 \r\n",
       "L 96.641177 334.137606 \r\n",
       "L 100.078931 334.003729 \r\n",
       "L 103.516686 333.834151 \r\n",
       "L 106.95444 333.628872 \r\n",
       "L 110.392194 333.387892 \r\n",
       "L 113.829949 333.111212 \r\n",
       "L 117.267703 332.798831 \r\n",
       "L 120.705458 332.45075 \r\n",
       "L 124.143212 332.066968 \r\n",
       "L 127.580967 331.647485 \r\n",
       "L 131.018721 331.192301 \r\n",
       "L 134.456476 330.701417 \r\n",
       "L 137.89423 330.174832 \r\n",
       "L 141.331984 329.612547 \r\n",
       "L 144.769739 329.014561 \r\n",
       "L 148.207493 328.380874 \r\n",
       "L 151.645248 327.711486 \r\n",
       "L 155.083002 327.006398 \r\n",
       "L 158.520757 326.265609 \r\n",
       "L 161.958511 325.48912 \r\n",
       "L 165.396265 324.67693 \r\n",
       "L 168.83402 323.829039 \r\n",
       "L 172.271774 322.945447 \r\n",
       "L 175.709529 322.026155 \r\n",
       "L 179.147283 321.071163 \r\n",
       "L 182.585038 320.080469 \r\n",
       "L 186.022792 319.054075 \r\n",
       "L 189.460547 317.99198 \r\n",
       "L 192.898301 316.894185 \r\n",
       "L 196.336055 315.760688 \r\n",
       "L 199.77381 314.591492 \r\n",
       "L 203.211564 313.386594 \r\n",
       "L 206.649319 312.145996 \r\n",
       "L 210.087073 310.869697 \r\n",
       "L 213.524828 309.557698 \r\n",
       "L 216.962582 308.209998 \r\n",
       "L 220.400337 306.826597 \r\n",
       "L 223.838091 305.407495 \r\n",
       "\" style=\"fill:none;stroke:#d62728;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_59\">\r\n",
       "    <path clip-path=\"url(#p87f20bf072)\" d=\"M 55.388123 338.153658 \r\n",
       "L 58.825878 338.415585 \r\n",
       "L 62.263632 338.645763 \r\n",
       "L 65.701387 338.844192 \r\n",
       "L 69.139141 339.010873 \r\n",
       "L 72.576896 339.145805 \r\n",
       "L 76.01465 339.248988 \r\n",
       "L 79.452404 339.320423 \r\n",
       "L 82.890159 339.360109 \r\n",
       "L 86.327913 339.368046 \r\n",
       "L 89.765668 339.344234 \r\n",
       "L 93.203422 339.288674 \r\n",
       "L 96.641177 339.201365 \r\n",
       "L 100.078931 339.082308 \r\n",
       "L 103.516686 338.931501 \r\n",
       "L 106.95444 338.748946 \r\n",
       "L 110.392194 338.534643 \r\n",
       "L 113.829949 338.28859 \r\n",
       "L 117.267703 338.010789 \r\n",
       "L 120.705458 337.70124 \r\n",
       "L 124.143212 337.359941 \r\n",
       "L 127.580967 336.986894 \r\n",
       "L 131.018721 336.582098 \r\n",
       "L 134.456476 336.145554 \r\n",
       "L 137.89423 335.677261 \r\n",
       "L 141.331984 335.177219 \r\n",
       "L 144.769739 334.645428 \r\n",
       "L 148.207493 334.081889 \r\n",
       "L 151.645248 333.486601 \r\n",
       "L 155.083002 332.859565 \r\n",
       "L 158.520757 332.200779 \r\n",
       "L 161.958511 331.510245 \r\n",
       "L 165.396265 330.787963 \r\n",
       "L 168.83402 330.033931 \r\n",
       "L 172.271774 329.248151 \r\n",
       "L 175.709529 328.430622 \r\n",
       "L 179.147283 327.581345 \r\n",
       "L 182.585038 326.700319 \r\n",
       "L 186.022792 325.787544 \r\n",
       "L 189.460547 324.843021 \r\n",
       "L 192.898301 323.866748 \r\n",
       "L 196.336055 322.858728 \r\n",
       "L 199.77381 321.818958 \r\n",
       "L 203.211564 320.74744 \r\n",
       "L 206.649319 319.644173 \r\n",
       "L 210.087073 318.509157 \r\n",
       "L 213.524828 317.342393 \r\n",
       "L 216.962582 316.14388 \r\n",
       "L 220.400337 314.913618 \r\n",
       "L 223.838091 313.651608 \r\n",
       "\" style=\"fill:none;stroke:#9467bd;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_18\">\r\n",
       "    <path d=\"M 46.965625 386.85375 \r\n",
       "L 46.965625 233.468383 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_19\">\r\n",
       "    <path d=\"M 232.260589 386.85375 \r\n",
       "L 232.260589 233.468383 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_20\">\r\n",
       "    <path d=\"M 46.965625 386.85375 \r\n",
       "L 232.260589 386.85375 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_21\">\r\n",
       "    <path d=\"M 46.965625 233.468383 \r\n",
       "L 232.260589 233.468383 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "  </g>\r\n",
       "  <g id=\"axes_5\">\r\n",
       "   <g id=\"patch_22\">\r\n",
       "    <path d=\"M 283.185589 386.85375 \r\n",
       "L 468.480554 386.85375 \r\n",
       "L 468.480554 233.468383 \r\n",
       "L 283.185589 233.468383 \r\n",
       "z\r\n",
       "\" style=\"fill:#ffffff;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"matplotlib.axis_9\">\r\n",
       "    <g id=\"xtick_16\">\r\n",
       "     <g id=\"line2d_60\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"333.72058\" xlink:href=\"#mc4737e2393\" y=\"386.85375\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_48\">\r\n",
       "      <!-- 4 -->\r\n",
       "      <g transform=\"translate(330.53933 401.452187)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-52\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"xtick_17\">\r\n",
       "     <g id=\"line2d_61\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"389.870569\" xlink:href=\"#mc4737e2393\" y=\"386.85375\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_49\">\r\n",
       "      <!-- 6 -->\r\n",
       "      <g transform=\"translate(386.689319 401.452187)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-54\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"xtick_18\">\r\n",
       "     <g id=\"line2d_62\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"446.020558\" xlink:href=\"#mc4737e2393\" y=\"386.85375\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_50\">\r\n",
       "      <!-- 8 -->\r\n",
       "      <g transform=\"translate(442.839308 401.452187)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-56\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"text_51\">\r\n",
       "     <!-- Độ lệch chuẩn thay đổi nhóm can thiệp -->\r\n",
       "     <g transform=\"translate(277.279947 416.15375)scale(0.1 -0.1)\">\r\n",
       "      <use xlink:href=\"#DejaVuSans-272\"/>\r\n",
       "      <use x=\"77.490234\" xlink:href=\"#DejaVuSans-7897\"/>\r\n",
       "      <use x=\"138.671875\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"170.458984\" xlink:href=\"#DejaVuSans-108\"/>\r\n",
       "      <use x=\"198.242188\" xlink:href=\"#DejaVuSans-7879\"/>\r\n",
       "      <use x=\"259.765625\" xlink:href=\"#DejaVuSans-99\"/>\r\n",
       "      <use x=\"314.746094\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "      <use x=\"378.125\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"409.912109\" xlink:href=\"#DejaVuSans-99\"/>\r\n",
       "      <use x=\"464.892578\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "      <use x=\"528.271484\" xlink:href=\"#DejaVuSans-117\"/>\r\n",
       "      <use x=\"591.650391\" xlink:href=\"#DejaVuSans-7849\"/>\r\n",
       "      <use x=\"652.929688\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"716.308594\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"748.095703\" xlink:href=\"#DejaVuSans-116\"/>\r\n",
       "      <use x=\"787.304688\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "      <use x=\"850.683594\" xlink:href=\"#DejaVuSans-97\"/>\r\n",
       "      <use x=\"911.962891\" xlink:href=\"#DejaVuSans-121\"/>\r\n",
       "      <use x=\"971.142578\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"1002.929688\" xlink:href=\"#DejaVuSans-273\"/>\r\n",
       "      <use x=\"1066.40625\" xlink:href=\"#DejaVuSans-7893\"/>\r\n",
       "      <use x=\"1127.587891\" xlink:href=\"#DejaVuSans-105\"/>\r\n",
       "      <use x=\"1155.371094\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"1187.158203\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"1250.537109\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "      <use x=\"1313.916016\" xlink:href=\"#DejaVuSans-243\"/>\r\n",
       "      <use x=\"1375.097656\" xlink:href=\"#DejaVuSans-109\"/>\r\n",
       "      <use x=\"1472.509766\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"1504.296875\" xlink:href=\"#DejaVuSans-99\"/>\r\n",
       "      <use x=\"1559.277344\" xlink:href=\"#DejaVuSans-97\"/>\r\n",
       "      <use x=\"1620.556641\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"1683.935547\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"1715.722656\" xlink:href=\"#DejaVuSans-116\"/>\r\n",
       "      <use x=\"1754.931641\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "      <use x=\"1818.310547\" xlink:href=\"#DejaVuSans-105\"/>\r\n",
       "      <use x=\"1846.09375\" xlink:href=\"#DejaVuSans-7879\"/>\r\n",
       "      <use x=\"1907.617188\" xlink:href=\"#DejaVuSans-112\"/>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "   </g>\r\n",
       "   <g id=\"matplotlib.axis_10\">\r\n",
       "    <g id=\"ytick_25\">\r\n",
       "     <g id=\"line2d_63\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"283.185589\" xlink:href=\"#m6a8762d578\" y=\"379.881688\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_52\">\r\n",
       "      <!-- 0 -->\r\n",
       "      <g transform=\"translate(269.823089 383.680907)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_26\">\r\n",
       "     <g id=\"line2d_64\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"283.185589\" xlink:href=\"#m6a8762d578\" y=\"349.870262\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_53\">\r\n",
       "      <!-- 50 -->\r\n",
       "      <g transform=\"translate(263.460589 353.669481)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_27\">\r\n",
       "     <g id=\"line2d_65\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"283.185589\" xlink:href=\"#m6a8762d578\" y=\"319.858836\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_54\">\r\n",
       "      <!-- 100 -->\r\n",
       "      <g transform=\"translate(257.098089 323.658055)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-49\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "       <use x=\"127.246094\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_28\">\r\n",
       "     <g id=\"line2d_66\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"283.185589\" xlink:href=\"#m6a8762d578\" y=\"289.84741\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_55\">\r\n",
       "      <!-- 150 -->\r\n",
       "      <g transform=\"translate(257.098089 293.646629)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-49\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "       <use x=\"127.246094\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_29\">\r\n",
       "     <g id=\"line2d_67\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"283.185589\" xlink:href=\"#m6a8762d578\" y=\"259.835984\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_56\">\r\n",
       "      <!-- 200 -->\r\n",
       "      <g transform=\"translate(257.098089 263.635203)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-50\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "       <use x=\"127.246094\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"text_57\">\r\n",
       "     <!-- Cỡ mẫu ước tính -->\r\n",
       "     <g transform=\"translate(251.018402 351.246223)rotate(-90)scale(0.1 -0.1)\">\r\n",
       "      <use xlink:href=\"#DejaVuSans-67\"/>\r\n",
       "      <use x=\"69.824219\" xlink:href=\"#DejaVuSans-7905\"/>\r\n",
       "      <use x=\"131.005859\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"162.792969\" xlink:href=\"#DejaVuSans-109\"/>\r\n",
       "      <use x=\"260.205078\" xlink:href=\"#DejaVuSans-7851\"/>\r\n",
       "      <use x=\"321.484375\" xlink:href=\"#DejaVuSans-117\"/>\r\n",
       "      <use x=\"384.863281\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"416.650391\" xlink:href=\"#DejaVuSans-432\"/>\r\n",
       "      <use x=\"480.029297\" xlink:href=\"#DejaVuSans-7899\"/>\r\n",
       "      <use x=\"541.210938\" xlink:href=\"#DejaVuSans-99\"/>\r\n",
       "      <use x=\"596.191406\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"627.978516\" xlink:href=\"#DejaVuSans-116\"/>\r\n",
       "      <use x=\"667.1875\" xlink:href=\"#DejaVuSans-237\"/>\r\n",
       "      <use x=\"694.970703\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"758.349609\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_41\">\r\n",
       "    <path clip-path=\"url(#p1c2664de10)\" d=\"M 361.795574 379.881688 \r\n",
       "L 361.795574 240.440445 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_42\">\r\n",
       "    <path clip-path=\"url(#p1c2664de10)\" d=\"M 291.608088 349.499762 \r\n",
       "L 460.058055 349.499762 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_43\">\r\n",
       "    <path clip-path=\"url(#p1c2664de10)\" d=\"M 361.795574 379.881688 \r\n",
       "L 361.795574 267.130566 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_44\">\r\n",
       "    <path clip-path=\"url(#p1c2664de10)\" d=\"M 291.608088 349.499762 \r\n",
       "L 460.058055 349.499762 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_45\">\r\n",
       "    <path clip-path=\"url(#p1c2664de10)\" d=\"M 361.795574 379.881688 \r\n",
       "L 361.795574 295.658374 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_46\">\r\n",
       "    <path clip-path=\"url(#p1c2664de10)\" d=\"M 291.608088 349.499762 \r\n",
       "L 460.058055 349.499762 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_47\">\r\n",
       "    <path clip-path=\"url(#p1c2664de10)\" d=\"M 361.795574 379.881688 \r\n",
       "L 361.795574 305.407495 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_48\">\r\n",
       "    <path clip-path=\"url(#p1c2664de10)\" d=\"M 291.608088 349.499762 \r\n",
       "L 460.058055 349.499762 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_49\">\r\n",
       "    <path clip-path=\"url(#p1c2664de10)\" d=\"M 361.795574 379.881688 \r\n",
       "L 361.795574 313.651608 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_50\">\r\n",
       "    <path clip-path=\"url(#p1c2664de10)\" d=\"M 291.608088 349.499762 \r\n",
       "L 460.058055 349.499762 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_68\">\r\n",
       "    <path clip-path=\"url(#p1c2664de10)\" d=\"M 291.608088 355.049686 \r\n",
       "L 295.045842 354.543706 \r\n",
       "L 298.483597 353.961351 \r\n",
       "L 301.921351 353.302623 \r\n",
       "L 305.359105 352.56752 \r\n",
       "L 308.79686 351.756042 \r\n",
       "L 312.234614 350.868191 \r\n",
       "L 315.672369 349.903965 \r\n",
       "L 319.110123 348.863364 \r\n",
       "L 322.547878 347.74639 \r\n",
       "L 325.985632 346.553041 \r\n",
       "L 329.423387 345.283317 \r\n",
       "L 332.861141 343.93722 \r\n",
       "L 336.298895 342.514748 \r\n",
       "L 339.73665 341.015901 \r\n",
       "L 343.174404 339.440681 \r\n",
       "L 346.612159 337.789085 \r\n",
       "L 350.049913 336.061116 \r\n",
       "L 353.487668 334.256772 \r\n",
       "L 356.925422 332.376054 \r\n",
       "L 360.363177 330.418962 \r\n",
       "L 363.800931 328.385495 \r\n",
       "L 367.238685 326.275654 \r\n",
       "L 370.67644 324.089439 \r\n",
       "L 374.114194 321.826849 \r\n",
       "L 377.551949 319.487885 \r\n",
       "L 380.989703 317.072546 \r\n",
       "L 384.427458 314.580834 \r\n",
       "L 387.865212 312.012747 \r\n",
       "L 391.302967 309.368285 \r\n",
       "L 394.740721 306.647449 \r\n",
       "L 398.178475 303.850239 \r\n",
       "L 401.61623 300.976655 \r\n",
       "L 405.053984 298.026696 \r\n",
       "L 408.491739 295.000363 \r\n",
       "L 411.929493 291.897655 \r\n",
       "L 415.367248 288.718574 \r\n",
       "L 418.805002 285.463117 \r\n",
       "L 422.242756 282.131287 \r\n",
       "L 425.680511 278.723082 \r\n",
       "L 429.118265 275.238503 \r\n",
       "L 432.55602 271.677549 \r\n",
       "L 435.993774 268.040222 \r\n",
       "L 439.431529 264.326519 \r\n",
       "L 442.869283 260.536443 \r\n",
       "L 446.307038 256.669992 \r\n",
       "L 449.744792 252.727167 \r\n",
       "L 453.182546 248.707967 \r\n",
       "L 456.620301 244.612394 \r\n",
       "L 460.058055 240.440445 \r\n",
       "\" style=\"fill:none;stroke:#1f77b4;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_69\">\r\n",
       "    <path clip-path=\"url(#p1c2664de10)\" d=\"M 291.608088 359.802721 \r\n",
       "L 295.045842 359.393589 \r\n",
       "L 298.483597 358.922702 \r\n",
       "L 301.921351 358.390059 \r\n",
       "L 305.359105 357.795661 \r\n",
       "L 308.79686 357.139506 \r\n",
       "L 312.234614 356.421596 \r\n",
       "L 315.672369 355.64193 \r\n",
       "L 319.110123 354.800509 \r\n",
       "L 322.547878 353.897332 \r\n",
       "L 325.985632 352.932399 \r\n",
       "L 329.423387 351.90571 \r\n",
       "L 332.861141 350.817266 \r\n",
       "L 336.298895 349.667066 \r\n",
       "L 339.73665 348.45511 \r\n",
       "L 343.174404 347.181399 \r\n",
       "L 346.612159 345.845932 \r\n",
       "L 350.049913 344.448709 \r\n",
       "L 353.487668 342.98973 \r\n",
       "L 356.925422 341.468996 \r\n",
       "L 360.363177 339.886506 \r\n",
       "L 363.800931 338.242261 \r\n",
       "L 367.238685 336.536259 \r\n",
       "L 370.67644 334.768502 \r\n",
       "L 374.114194 332.938989 \r\n",
       "L 377.551949 331.047721 \r\n",
       "L 380.989703 329.094697 \r\n",
       "L 384.427458 327.079917 \r\n",
       "L 387.865212 325.003381 \r\n",
       "L 391.302967 322.86509 \r\n",
       "L 394.740721 320.665043 \r\n",
       "L 398.178475 318.40324 \r\n",
       "L 401.61623 316.079682 \r\n",
       "L 405.053984 313.694368 \r\n",
       "L 408.491739 311.247298 \r\n",
       "L 411.929493 308.738473 \r\n",
       "L 415.367248 306.167891 \r\n",
       "L 418.805002 303.535554 \r\n",
       "L 422.242756 300.841462 \r\n",
       "L 425.680511 298.085613 \r\n",
       "L 429.118265 295.268009 \r\n",
       "L 432.55602 292.38865 \r\n",
       "L 435.993774 289.447534 \r\n",
       "L 439.431529 286.444663 \r\n",
       "L 442.869283 283.380036 \r\n",
       "L 446.307038 280.253654 \r\n",
       "L 449.744792 277.065515 \r\n",
       "L 453.182546 273.815621 \r\n",
       "L 456.620301 270.503972 \r\n",
       "L 460.058055 267.130566 \r\n",
       "\" style=\"fill:none;stroke:#ff7f0e;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_70\">\r\n",
       "    <path clip-path=\"url(#p1c2664de10)\" d=\"M 291.608088 364.883016 \r\n",
       "L 295.045842 364.577401 \r\n",
       "L 298.483597 364.225655 \r\n",
       "L 301.921351 363.827779 \r\n",
       "L 305.359105 363.383773 \r\n",
       "L 308.79686 362.893636 \r\n",
       "L 312.234614 362.357368 \r\n",
       "L 315.672369 361.77497 \r\n",
       "L 319.110123 361.146442 \r\n",
       "L 322.547878 360.471783 \r\n",
       "L 325.985632 359.750993 \r\n",
       "L 329.423387 358.984073 \r\n",
       "L 332.861141 358.171022 \r\n",
       "L 336.298895 357.311841 \r\n",
       "L 339.73665 356.406529 \r\n",
       "L 343.174404 355.455086 \r\n",
       "L 346.612159 354.457513 \r\n",
       "L 350.049913 353.41381 \r\n",
       "L 353.487668 352.323976 \r\n",
       "L 356.925422 351.188011 \r\n",
       "L 360.363177 350.005916 \r\n",
       "L 363.800931 348.777691 \r\n",
       "L 367.238685 347.503335 \r\n",
       "L 370.67644 346.182848 \r\n",
       "L 374.114194 344.816231 \r\n",
       "L 377.551949 343.403483 \r\n",
       "L 380.989703 341.944604 \r\n",
       "L 384.427458 340.439596 \r\n",
       "L 387.865212 338.888456 \r\n",
       "L 391.302967 337.291186 \r\n",
       "L 394.740721 335.647786 \r\n",
       "L 398.178475 333.958255 \r\n",
       "L 401.61623 332.222593 \r\n",
       "L 405.053984 330.440801 \r\n",
       "L 408.491739 328.612878 \r\n",
       "L 411.929493 326.738825 \r\n",
       "L 415.367248 324.818641 \r\n",
       "L 418.805002 322.852327 \r\n",
       "L 422.242756 320.839882 \r\n",
       "L 425.680511 318.781307 \r\n",
       "L 429.118265 316.676601 \r\n",
       "L 432.55602 314.525765 \r\n",
       "L 435.993774 312.328798 \r\n",
       "L 439.431529 310.0857 \r\n",
       "L 442.869283 307.796472 \r\n",
       "L 446.307038 305.461114 \r\n",
       "L 449.744792 303.079624 \r\n",
       "L 453.182546 300.652005 \r\n",
       "L 456.620301 298.178255 \r\n",
       "L 460.058055 295.658374 \r\n",
       "\" style=\"fill:none;stroke:#2ca02c;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_71\">\r\n",
       "    <path clip-path=\"url(#p1c2664de10)\" d=\"M 291.608088 366.61916 \r\n",
       "L 295.045842 366.348922 \r\n",
       "L 298.483597 366.037892 \r\n",
       "L 301.921351 365.686071 \r\n",
       "L 305.359105 365.29346 \r\n",
       "L 308.79686 364.860058 \r\n",
       "L 312.234614 364.385865 \r\n",
       "L 315.672369 363.870882 \r\n",
       "L 319.110123 363.315107 \r\n",
       "L 322.547878 362.718542 \r\n",
       "L 325.985632 362.081186 \r\n",
       "L 329.423387 361.403039 \r\n",
       "L 332.861141 360.684102 \r\n",
       "L 336.298895 359.924374 \r\n",
       "L 339.73665 359.123854 \r\n",
       "L 343.174404 358.282545 \r\n",
       "L 346.612159 357.400444 \r\n",
       "L 350.049913 356.477553 \r\n",
       "L 353.487668 355.51387 \r\n",
       "L 356.925422 354.509397 \r\n",
       "L 360.363177 353.464134 \r\n",
       "L 363.800931 352.378079 \r\n",
       "L 367.238685 351.251234 \r\n",
       "L 370.67644 350.083598 \r\n",
       "L 374.114194 348.875171 \r\n",
       "L 377.551949 347.625953 \r\n",
       "L 380.989703 346.335945 \r\n",
       "L 384.427458 345.005146 \r\n",
       "L 387.865212 343.633556 \r\n",
       "L 391.302967 342.221175 \r\n",
       "L 394.740721 340.768003 \r\n",
       "L 398.178475 339.274041 \r\n",
       "L 401.61623 337.739288 \r\n",
       "L 405.053984 336.163744 \r\n",
       "L 408.491739 334.547409 \r\n",
       "L 411.929493 332.890284 \r\n",
       "L 415.367248 331.192367 \r\n",
       "L 418.805002 329.45366 \r\n",
       "L 422.242756 327.674163 \r\n",
       "L 425.680511 325.853874 \r\n",
       "L 429.118265 323.992795 \r\n",
       "L 432.55602 322.090925 \r\n",
       "L 435.993774 320.148264 \r\n",
       "L 439.431529 318.164812 \r\n",
       "L 442.869283 316.140569 \r\n",
       "L 446.307038 314.075536 \r\n",
       "L 449.744792 311.969712 \r\n",
       "L 453.182546 309.823097 \r\n",
       "L 456.620301 307.635692 \r\n",
       "L 460.058055 305.407495 \r\n",
       "\" style=\"fill:none;stroke:#d62728;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_72\">\r\n",
       "    <path clip-path=\"url(#p1c2664de10)\" d=\"M 291.608088 368.08729 \r\n",
       "L 295.045842 367.846966 \r\n",
       "L 298.483597 367.570366 \r\n",
       "L 301.921351 367.257492 \r\n",
       "L 305.359105 366.908341 \r\n",
       "L 308.79686 366.522916 \r\n",
       "L 312.234614 366.101215 \r\n",
       "L 315.672369 365.643239 \r\n",
       "L 319.110123 365.148988 \r\n",
       "L 322.547878 364.618461 \r\n",
       "L 325.985632 364.051658 \r\n",
       "L 329.423387 363.448581 \r\n",
       "L 332.861141 362.809228 \r\n",
       "L 336.298895 362.1336 \r\n",
       "L 339.73665 361.421696 \r\n",
       "L 343.174404 360.673517 \r\n",
       "L 346.612159 359.889063 \r\n",
       "L 350.049913 359.068334 \r\n",
       "L 353.487668 358.211329 \r\n",
       "L 356.925422 357.318048 \r\n",
       "L 360.363177 356.388493 \r\n",
       "L 363.800931 355.422662 \r\n",
       "L 367.238685 354.420556 \r\n",
       "L 370.67644 353.382174 \r\n",
       "L 374.114194 352.307517 \r\n",
       "L 377.551949 351.196585 \r\n",
       "L 380.989703 350.049377 \r\n",
       "L 384.427458 348.865894 \r\n",
       "L 387.865212 347.646136 \r\n",
       "L 391.302967 346.390102 \r\n",
       "L 394.740721 345.097793 \r\n",
       "L 398.178475 343.769209 \r\n",
       "L 401.61623 342.404349 \r\n",
       "L 405.053984 341.003214 \r\n",
       "L 408.491739 339.565804 \r\n",
       "L 411.929493 338.092118 \r\n",
       "L 415.367248 336.582157 \r\n",
       "L 418.805002 335.035921 \r\n",
       "L 422.242756 333.453409 \r\n",
       "L 425.680511 331.834622 \r\n",
       "L 429.118265 330.17956 \r\n",
       "L 432.55602 328.488222 \r\n",
       "L 435.993774 326.760609 \r\n",
       "L 439.431529 324.99672 \r\n",
       "L 442.869283 323.196557 \r\n",
       "L 446.307038 321.360118 \r\n",
       "L 449.744792 319.487403 \r\n",
       "L 453.182546 317.578413 \r\n",
       "L 456.620301 315.633148 \r\n",
       "L 460.058055 313.651608 \r\n",
       "\" style=\"fill:none;stroke:#9467bd;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_23\">\r\n",
       "    <path d=\"M 283.185589 386.85375 \r\n",
       "L 283.185589 233.468383 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_24\">\r\n",
       "    <path d=\"M 468.480554 386.85375 \r\n",
       "L 468.480554 233.468383 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_25\">\r\n",
       "    <path d=\"M 283.185589 386.85375 \r\n",
       "L 468.480554 386.85375 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_26\">\r\n",
       "    <path d=\"M 283.185589 233.468383 \r\n",
       "L 468.480554 233.468383 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "  </g>\r\n",
       "  <g id=\"axes_6\">\r\n",
       "   <g id=\"patch_27\">\r\n",
       "    <path d=\"M 519.405554 386.85375 \r\n",
       "L 704.700518 386.85375 \r\n",
       "L 704.700518 233.468383 \r\n",
       "L 519.405554 233.468383 \r\n",
       "z\r\n",
       "\" style=\"fill:#ffffff;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"matplotlib.axis_11\">\r\n",
       "    <g id=\"xtick_19\">\r\n",
       "     <g id=\"line2d_73\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"546.544715\" xlink:href=\"#mc4737e2393\" y=\"386.85375\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_58\">\r\n",
       "      <!-- 0.2 -->\r\n",
       "      <g transform=\"translate(538.593153 401.452187)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-46\"/>\r\n",
       "       <use x=\"95.410156\" xlink:href=\"#DejaVuSans-50\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"xtick_20\">\r\n",
       "     <g id=\"line2d_74\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"583.978041\" xlink:href=\"#mc4737e2393\" y=\"386.85375\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_59\">\r\n",
       "      <!-- 0.4 -->\r\n",
       "      <g transform=\"translate(576.026479 401.452187)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-46\"/>\r\n",
       "       <use x=\"95.410156\" xlink:href=\"#DejaVuSans-52\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"xtick_21\">\r\n",
       "     <g id=\"line2d_75\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"621.411367\" xlink:href=\"#mc4737e2393\" y=\"386.85375\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_60\">\r\n",
       "      <!-- 0.6 -->\r\n",
       "      <g transform=\"translate(613.459805 401.452187)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-46\"/>\r\n",
       "       <use x=\"95.410156\" xlink:href=\"#DejaVuSans-54\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"xtick_22\">\r\n",
       "     <g id=\"line2d_76\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"658.844694\" xlink:href=\"#mc4737e2393\" y=\"386.85375\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_61\">\r\n",
       "      <!-- 0.8 -->\r\n",
       "      <g transform=\"translate(650.893131 401.452187)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-46\"/>\r\n",
       "       <use x=\"95.410156\" xlink:href=\"#DejaVuSans-56\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"xtick_23\">\r\n",
       "     <g id=\"line2d_77\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"696.27802\" xlink:href=\"#mc4737e2393\" y=\"386.85375\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_62\">\r\n",
       "      <!-- 1.0 -->\r\n",
       "      <g transform=\"translate(688.326457 401.452187)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-49\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-46\"/>\r\n",
       "       <use x=\"95.410156\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"text_63\">\r\n",
       "     <!-- Hệ số tương quan rho nhóm can thiệp -->\r\n",
       "     <g transform=\"translate(517.107723 415.994375)scale(0.1 -0.1)\">\r\n",
       "      <defs>\r\n",
       "       <path d=\"M 44.28125 53.078125 \r\n",
       "L 44.28125 44.578125 \r\n",
       "Q 40.484375 46.53125 36.375 47.5 \r\n",
       "Q 32.28125 48.484375 27.875 48.484375 \r\n",
       "Q 21.1875 48.484375 17.84375 46.4375 \r\n",
       "Q 14.5 44.390625 14.5 40.28125 \r\n",
       "Q 14.5 37.15625 16.890625 35.375 \r\n",
       "Q 19.28125 33.59375 26.515625 31.984375 \r\n",
       "L 29.59375 31.296875 \r\n",
       "Q 39.15625 29.25 43.1875 25.515625 \r\n",
       "Q 47.21875 21.78125 47.21875 15.09375 \r\n",
       "Q 47.21875 7.46875 41.1875 3.015625 \r\n",
       "Q 35.15625 -1.421875 24.609375 -1.421875 \r\n",
       "Q 20.21875 -1.421875 15.453125 -0.5625 \r\n",
       "Q 10.6875 0.296875 5.421875 2 \r\n",
       "L 5.421875 11.28125 \r\n",
       "Q 10.40625 8.6875 15.234375 7.390625 \r\n",
       "Q 20.0625 6.109375 24.8125 6.109375 \r\n",
       "Q 31.15625 6.109375 34.5625 8.28125 \r\n",
       "Q 37.984375 10.453125 37.984375 14.40625 \r\n",
       "Q 37.984375 18.0625 35.515625 20.015625 \r\n",
       "Q 33.0625 21.96875 24.703125 23.78125 \r\n",
       "L 21.578125 24.515625 \r\n",
       "Q 13.234375 26.265625 9.515625 29.90625 \r\n",
       "Q 5.8125 33.546875 5.8125 39.890625 \r\n",
       "Q 5.8125 47.609375 11.28125 51.796875 \r\n",
       "Q 16.75 56 26.8125 56 \r\n",
       "Q 31.78125 56 36.171875 55.265625 \r\n",
       "Q 40.578125 54.546875 44.28125 53.078125 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-115\"/>\r\n",
       "       <path d=\"M 25.984375 74.609375 \r\n",
       "L 35.15625 74.609375 \r\n",
       "L 45.453125 61.625 \r\n",
       "L 38.671875 61.625 \r\n",
       "L 30.5625 70.3125 \r\n",
       "L 22.46875 61.625 \r\n",
       "L 15.671875 61.625 \r\n",
       "z\r\n",
       "M 51.03125 84.625 \r\n",
       "L 60.0625 84.625 \r\n",
       "L 48.921875 71.734375 \r\n",
       "L 41.453125 71.734375 \r\n",
       "z\r\n",
       "M 30.609375 48.390625 \r\n",
       "Q 23.390625 48.390625 19.1875 42.75 \r\n",
       "Q 14.984375 37.109375 14.984375 27.296875 \r\n",
       "Q 14.984375 17.484375 19.15625 11.84375 \r\n",
       "Q 23.34375 6.203125 30.609375 6.203125 \r\n",
       "Q 37.796875 6.203125 41.984375 11.859375 \r\n",
       "Q 46.1875 17.53125 46.1875 27.296875 \r\n",
       "Q 46.1875 37.015625 41.984375 42.703125 \r\n",
       "Q 37.796875 48.390625 30.609375 48.390625 \r\n",
       "z\r\n",
       "M 30.609375 56 \r\n",
       "Q 42.328125 56 49.015625 48.375 \r\n",
       "Q 55.71875 40.765625 55.71875 27.296875 \r\n",
       "Q 55.71875 13.875 49.015625 6.21875 \r\n",
       "Q 42.328125 -1.421875 30.609375 -1.421875 \r\n",
       "Q 18.84375 -1.421875 12.171875 6.21875 \r\n",
       "Q 5.515625 13.875 5.515625 27.296875 \r\n",
       "Q 5.515625 40.765625 12.171875 48.375 \r\n",
       "Q 18.84375 56 30.609375 56 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-7889\"/>\r\n",
       "       <path d=\"M 41.015625 48.53125 \r\n",
       "L 41.015625 54.34375 \r\n",
       "Q 44 52.140625 46.140625 51.09375 \r\n",
       "Q 48.296875 50.046875 49.8125 50.046875 \r\n",
       "Q 52.046875 50.046875 53.171875 51.390625 \r\n",
       "Q 54.296875 52.734375 54.296875 55.359375 \r\n",
       "Q 54.296875 56.921875 53.921875 58.4375 \r\n",
       "Q 53.5625 59.953125 52.828125 61.46875 \r\n",
       "L 59.328125 61.46875 \r\n",
       "Q 59.8125 59.609375 60.046875 57.953125 \r\n",
       "Q 60.296875 56.296875 60.296875 54.828125 \r\n",
       "Q 60.296875 48.875 58.171875 46.0625 \r\n",
       "Q 56.0625 43.25 51.515625 43.25 \r\n",
       "Q 49.171875 43.25 46.609375 44.546875 \r\n",
       "Q 44.046875 45.84375 41.015625 48.53125 \r\n",
       "z\r\n",
       "M 30.859375 48.390625 \r\n",
       "Q 23.640625 48.390625 19.4375 42.75 \r\n",
       "Q 15.234375 37.109375 15.234375 27.296875 \r\n",
       "Q 15.234375 17.484375 19.40625 11.84375 \r\n",
       "Q 23.578125 6.203125 30.859375 6.203125 \r\n",
       "Q 38.03125 6.203125 42.234375 11.859375 \r\n",
       "Q 46.4375 17.53125 46.4375 27.296875 \r\n",
       "Q 46.4375 37.015625 42.234375 42.703125 \r\n",
       "Q 38.03125 48.390625 30.859375 48.390625 \r\n",
       "z\r\n",
       "M 30.859375 56 \r\n",
       "Q 42.578125 56 49.265625 48.375 \r\n",
       "Q 55.953125 40.765625 55.953125 27.296875 \r\n",
       "Q 55.953125 13.875 49.265625 6.21875 \r\n",
       "Q 42.578125 -1.421875 30.859375 -1.421875 \r\n",
       "Q 19.09375 -1.421875 12.421875 6.21875 \r\n",
       "Q 5.765625 13.875 5.765625 27.296875 \r\n",
       "Q 5.765625 40.765625 12.421875 48.375 \r\n",
       "Q 19.09375 56 30.859375 56 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-417\"/>\r\n",
       "       <path d=\"M 14.796875 27.296875 \r\n",
       "Q 14.796875 17.390625 18.875 11.75 \r\n",
       "Q 22.953125 6.109375 30.078125 6.109375 \r\n",
       "Q 37.203125 6.109375 41.296875 11.75 \r\n",
       "Q 45.40625 17.390625 45.40625 27.296875 \r\n",
       "Q 45.40625 37.203125 41.296875 42.84375 \r\n",
       "Q 37.203125 48.484375 30.078125 48.484375 \r\n",
       "Q 22.953125 48.484375 18.875 42.84375 \r\n",
       "Q 14.796875 37.203125 14.796875 27.296875 \r\n",
       "z\r\n",
       "M 45.40625 8.203125 \r\n",
       "Q 42.578125 3.328125 38.25 0.953125 \r\n",
       "Q 33.9375 -1.421875 27.875 -1.421875 \r\n",
       "Q 17.96875 -1.421875 11.734375 6.484375 \r\n",
       "Q 5.515625 14.40625 5.515625 27.296875 \r\n",
       "Q 5.515625 40.1875 11.734375 48.09375 \r\n",
       "Q 17.96875 56 27.875 56 \r\n",
       "Q 33.9375 56 38.25 53.625 \r\n",
       "Q 42.578125 51.265625 45.40625 46.390625 \r\n",
       "L 45.40625 54.6875 \r\n",
       "L 54.390625 54.6875 \r\n",
       "L 54.390625 -20.796875 \r\n",
       "L 45.40625 -20.796875 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-113\"/>\r\n",
       "       <path d=\"M 30.609375 48.390625 \r\n",
       "Q 23.390625 48.390625 19.1875 42.75 \r\n",
       "Q 14.984375 37.109375 14.984375 27.296875 \r\n",
       "Q 14.984375 17.484375 19.15625 11.84375 \r\n",
       "Q 23.34375 6.203125 30.609375 6.203125 \r\n",
       "Q 37.796875 6.203125 41.984375 11.859375 \r\n",
       "Q 46.1875 17.53125 46.1875 27.296875 \r\n",
       "Q 46.1875 37.015625 41.984375 42.703125 \r\n",
       "Q 37.796875 48.390625 30.609375 48.390625 \r\n",
       "z\r\n",
       "M 30.609375 56 \r\n",
       "Q 42.328125 56 49.015625 48.375 \r\n",
       "Q 55.71875 40.765625 55.71875 27.296875 \r\n",
       "Q 55.71875 13.875 49.015625 6.21875 \r\n",
       "Q 42.328125 -1.421875 30.609375 -1.421875 \r\n",
       "Q 18.84375 -1.421875 12.171875 6.21875 \r\n",
       "Q 5.515625 13.875 5.515625 27.296875 \r\n",
       "Q 5.515625 40.765625 12.171875 48.375 \r\n",
       "Q 18.84375 56 30.609375 56 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-111\"/>\r\n",
       "      </defs>\r\n",
       "      <use xlink:href=\"#DejaVuSans-72\"/>\r\n",
       "      <use x=\"75.195312\" xlink:href=\"#DejaVuSans-7879\"/>\r\n",
       "      <use x=\"136.71875\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"168.505859\" xlink:href=\"#DejaVuSans-115\"/>\r\n",
       "      <use x=\"220.605469\" xlink:href=\"#DejaVuSans-7889\"/>\r\n",
       "      <use x=\"281.787109\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"313.574219\" xlink:href=\"#DejaVuSans-116\"/>\r\n",
       "      <use x=\"352.783203\" xlink:href=\"#DejaVuSans-432\"/>\r\n",
       "      <use x=\"416.162109\" xlink:href=\"#DejaVuSans-417\"/>\r\n",
       "      <use x=\"477.34375\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"540.722656\" xlink:href=\"#DejaVuSans-103\"/>\r\n",
       "      <use x=\"604.199219\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"635.986328\" xlink:href=\"#DejaVuSans-113\"/>\r\n",
       "      <use x=\"699.462891\" xlink:href=\"#DejaVuSans-117\"/>\r\n",
       "      <use x=\"762.841797\" xlink:href=\"#DejaVuSans-97\"/>\r\n",
       "      <use x=\"824.121094\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"887.5\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"919.287109\" xlink:href=\"#DejaVuSans-114\"/>\r\n",
       "      <use x=\"958.650391\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "      <use x=\"1022.029297\" xlink:href=\"#DejaVuSans-111\"/>\r\n",
       "      <use x=\"1083.210938\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"1114.998047\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"1178.376953\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "      <use x=\"1241.755859\" xlink:href=\"#DejaVuSans-243\"/>\r\n",
       "      <use x=\"1302.9375\" xlink:href=\"#DejaVuSans-109\"/>\r\n",
       "      <use x=\"1400.349609\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"1432.136719\" xlink:href=\"#DejaVuSans-99\"/>\r\n",
       "      <use x=\"1487.117188\" xlink:href=\"#DejaVuSans-97\"/>\r\n",
       "      <use x=\"1548.396484\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"1611.775391\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"1643.5625\" xlink:href=\"#DejaVuSans-116\"/>\r\n",
       "      <use x=\"1682.771484\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "      <use x=\"1746.150391\" xlink:href=\"#DejaVuSans-105\"/>\r\n",
       "      <use x=\"1773.933594\" xlink:href=\"#DejaVuSans-7879\"/>\r\n",
       "      <use x=\"1835.457031\" xlink:href=\"#DejaVuSans-112\"/>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "   </g>\r\n",
       "   <g id=\"matplotlib.axis_12\">\r\n",
       "    <g id=\"ytick_30\">\r\n",
       "     <g id=\"line2d_78\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"519.405554\" xlink:href=\"#m6a8762d578\" y=\"379.881688\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_64\">\r\n",
       "      <!-- 0 -->\r\n",
       "      <g transform=\"translate(506.043054 383.680907)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_31\">\r\n",
       "     <g id=\"line2d_79\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"519.405554\" xlink:href=\"#m6a8762d578\" y=\"355.539087\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_65\">\r\n",
       "      <!-- 25 -->\r\n",
       "      <g transform=\"translate(499.680554 359.338306)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-50\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_32\">\r\n",
       "     <g id=\"line2d_80\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"519.405554\" xlink:href=\"#m6a8762d578\" y=\"331.196486\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_66\">\r\n",
       "      <!-- 50 -->\r\n",
       "      <g transform=\"translate(499.680554 334.995705)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_33\">\r\n",
       "     <g id=\"line2d_81\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"519.405554\" xlink:href=\"#m6a8762d578\" y=\"306.853885\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_67\">\r\n",
       "      <!-- 75 -->\r\n",
       "      <g transform=\"translate(499.680554 310.653104)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-55\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_34\">\r\n",
       "     <g id=\"line2d_82\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"519.405554\" xlink:href=\"#m6a8762d578\" y=\"282.511284\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_68\">\r\n",
       "      <!-- 100 -->\r\n",
       "      <g transform=\"translate(493.318054 286.310503)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-49\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "       <use x=\"127.246094\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_35\">\r\n",
       "     <g id=\"line2d_83\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"519.405554\" xlink:href=\"#m6a8762d578\" y=\"258.168683\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_69\">\r\n",
       "      <!-- 125 -->\r\n",
       "      <g transform=\"translate(493.318054 261.967902)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-49\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-50\"/>\r\n",
       "       <use x=\"127.246094\" xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"ytick_36\">\r\n",
       "     <g id=\"line2d_84\">\r\n",
       "      <g>\r\n",
       "       <use style=\"stroke:#000000;stroke-width:0.8;\" x=\"519.405554\" xlink:href=\"#m6a8762d578\" y=\"233.826082\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "     <g id=\"text_70\">\r\n",
       "      <!-- 150 -->\r\n",
       "      <g transform=\"translate(493.318054 237.625301)scale(0.1 -0.1)\">\r\n",
       "       <use xlink:href=\"#DejaVuSans-49\"/>\r\n",
       "       <use x=\"63.623047\" xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "       <use x=\"127.246094\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      </g>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"text_71\">\r\n",
       "     <!-- Cỡ mẫu ước tính -->\r\n",
       "     <g transform=\"translate(487.238366 351.246223)rotate(-90)scale(0.1 -0.1)\">\r\n",
       "      <use xlink:href=\"#DejaVuSans-67\"/>\r\n",
       "      <use x=\"69.824219\" xlink:href=\"#DejaVuSans-7905\"/>\r\n",
       "      <use x=\"131.005859\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"162.792969\" xlink:href=\"#DejaVuSans-109\"/>\r\n",
       "      <use x=\"260.205078\" xlink:href=\"#DejaVuSans-7851\"/>\r\n",
       "      <use x=\"321.484375\" xlink:href=\"#DejaVuSans-117\"/>\r\n",
       "      <use x=\"384.863281\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"416.650391\" xlink:href=\"#DejaVuSans-432\"/>\r\n",
       "      <use x=\"480.029297\" xlink:href=\"#DejaVuSans-7899\"/>\r\n",
       "      <use x=\"541.210938\" xlink:href=\"#DejaVuSans-99\"/>\r\n",
       "      <use x=\"596.191406\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"627.978516\" xlink:href=\"#DejaVuSans-116\"/>\r\n",
       "      <use x=\"667.1875\" xlink:href=\"#DejaVuSans-237\"/>\r\n",
       "      <use x=\"694.970703\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "      <use x=\"758.349609\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_51\">\r\n",
       "    <path clip-path=\"url(#p68fd379b60)\" d=\"M 602.694704 379.881688 \r\n",
       "L 602.694704 240.440445 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_52\">\r\n",
       "    <path clip-path=\"url(#p68fd379b60)\" d=\"M 527.828052 330.595452 \r\n",
       "L 696.27802 330.595452 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_53\">\r\n",
       "    <path clip-path=\"url(#p68fd379b60)\" d=\"M 602.694704 379.881688 \r\n",
       "L 602.694704 267.130566 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_54\">\r\n",
       "    <path clip-path=\"url(#p68fd379b60)\" d=\"M 527.828052 330.595452 \r\n",
       "L 696.27802 330.595452 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_55\">\r\n",
       "    <path clip-path=\"url(#p68fd379b60)\" d=\"M 602.694704 379.881688 \r\n",
       "L 602.694704 295.658374 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_56\">\r\n",
       "    <path clip-path=\"url(#p68fd379b60)\" d=\"M 527.828052 330.595452 \r\n",
       "L 696.27802 330.595452 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_57\">\r\n",
       "    <path clip-path=\"url(#p68fd379b60)\" d=\"M 602.694704 379.881688 \r\n",
       "L 602.694704 305.407495 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_58\">\r\n",
       "    <path clip-path=\"url(#p68fd379b60)\" d=\"M 527.828052 330.595452 \r\n",
       "L 696.27802 330.595452 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_59\">\r\n",
       "    <path clip-path=\"url(#p68fd379b60)\" d=\"M 602.694704 379.881688 \r\n",
       "L 602.694704 313.651608 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"LineCollection_60\">\r\n",
       "    <path clip-path=\"url(#p68fd379b60)\" d=\"M 527.828052 330.595452 \r\n",
       "L 696.27802 330.595452 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-dasharray:2.96,1.28;stroke-dashoffset:0;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_85\">\r\n",
       "    <path clip-path=\"url(#p68fd379b60)\" d=\"M 527.828052 240.440445 \r\n",
       "L 531.265807 243.096469 \r\n",
       "L 534.703561 245.752493 \r\n",
       "L 538.141315 248.408516 \r\n",
       "L 541.57907 251.06454 \r\n",
       "L 545.016824 253.720564 \r\n",
       "L 548.454579 256.376587 \r\n",
       "L 551.892333 259.032611 \r\n",
       "L 555.330088 261.688635 \r\n",
       "L 558.767842 264.344658 \r\n",
       "L 562.205596 267.000682 \r\n",
       "L 565.643351 269.656706 \r\n",
       "L 569.081105 272.312729 \r\n",
       "L 572.51886 274.968753 \r\n",
       "L 575.956614 277.624777 \r\n",
       "L 579.394369 280.2808 \r\n",
       "L 582.832123 282.936824 \r\n",
       "L 586.269878 285.592848 \r\n",
       "L 589.707632 288.248871 \r\n",
       "L 593.145386 290.904895 \r\n",
       "L 596.583141 293.560919 \r\n",
       "L 600.020895 296.216942 \r\n",
       "L 603.45865 298.872966 \r\n",
       "L 606.896404 301.52899 \r\n",
       "L 610.334159 304.185013 \r\n",
       "L 613.771913 306.841037 \r\n",
       "L 617.209668 309.497061 \r\n",
       "L 620.647422 312.153084 \r\n",
       "L 624.085176 314.809108 \r\n",
       "L 627.522931 317.465132 \r\n",
       "L 630.960685 320.121155 \r\n",
       "L 634.39844 322.777179 \r\n",
       "L 637.836194 325.433203 \r\n",
       "L 641.273949 328.089226 \r\n",
       "L 644.711703 330.74525 \r\n",
       "L 648.149457 333.401274 \r\n",
       "L 651.587212 336.057297 \r\n",
       "L 655.024966 338.713321 \r\n",
       "L 658.462721 341.369345 \r\n",
       "L 661.900475 344.025368 \r\n",
       "L 665.33823 346.681392 \r\n",
       "L 668.775984 349.337416 \r\n",
       "L 672.213739 351.993439 \r\n",
       "L 675.651493 354.649463 \r\n",
       "L 679.089247 357.305487 \r\n",
       "L 682.527002 359.96151 \r\n",
       "L 685.964756 362.617534 \r\n",
       "L 689.402511 365.273558 \r\n",
       "L 692.840265 367.929581 \r\n",
       "L 696.27802 370.585605 \r\n",
       "\" style=\"fill:none;stroke:#1f77b4;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_86\">\r\n",
       "    <path clip-path=\"url(#p68fd379b60)\" d=\"M 527.828052 267.130566 \r\n",
       "L 531.265807 269.278207 \r\n",
       "L 534.703561 271.425847 \r\n",
       "L 538.141315 273.573488 \r\n",
       "L 541.57907 275.721128 \r\n",
       "L 545.016824 277.868768 \r\n",
       "L 548.454579 280.016409 \r\n",
       "L 551.892333 282.164049 \r\n",
       "L 555.330088 284.31169 \r\n",
       "L 558.767842 286.45933 \r\n",
       "L 562.205596 288.606971 \r\n",
       "L 565.643351 290.754611 \r\n",
       "L 569.081105 292.902251 \r\n",
       "L 572.51886 295.049892 \r\n",
       "L 575.956614 297.197532 \r\n",
       "L 579.394369 299.345173 \r\n",
       "L 582.832123 301.492813 \r\n",
       "L 586.269878 303.640453 \r\n",
       "L 589.707632 305.788094 \r\n",
       "L 593.145386 307.935734 \r\n",
       "L 596.583141 310.083375 \r\n",
       "L 600.020895 312.231015 \r\n",
       "L 603.45865 314.378655 \r\n",
       "L 606.896404 316.526296 \r\n",
       "L 610.334159 318.673936 \r\n",
       "L 613.771913 320.821577 \r\n",
       "L 617.209668 322.969217 \r\n",
       "L 620.647422 325.116857 \r\n",
       "L 624.085176 327.264498 \r\n",
       "L 627.522931 329.412138 \r\n",
       "L 630.960685 331.559779 \r\n",
       "L 634.39844 333.707419 \r\n",
       "L 637.836194 335.855059 \r\n",
       "L 641.273949 338.0027 \r\n",
       "L 644.711703 340.15034 \r\n",
       "L 648.149457 342.297981 \r\n",
       "L 651.587212 344.445621 \r\n",
       "L 655.024966 346.593262 \r\n",
       "L 658.462721 348.740902 \r\n",
       "L 661.900475 350.888542 \r\n",
       "L 665.33823 353.036183 \r\n",
       "L 668.775984 355.183823 \r\n",
       "L 672.213739 357.331464 \r\n",
       "L 675.651493 359.479104 \r\n",
       "L 679.089247 361.626744 \r\n",
       "L 682.527002 363.774385 \r\n",
       "L 685.964756 365.922025 \r\n",
       "L 689.402511 368.069666 \r\n",
       "L 692.840265 370.217306 \r\n",
       "L 696.27802 372.364946 \r\n",
       "\" style=\"fill:none;stroke:#ff7f0e;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_87\">\r\n",
       "    <path clip-path=\"url(#p68fd379b60)\" d=\"M 527.828052 295.658374 \r\n",
       "L 531.265807 297.262627 \r\n",
       "L 534.703561 298.866881 \r\n",
       "L 538.141315 300.471135 \r\n",
       "L 541.57907 302.075388 \r\n",
       "L 545.016824 303.679642 \r\n",
       "L 548.454579 305.283895 \r\n",
       "L 551.892333 306.888149 \r\n",
       "L 555.330088 308.492403 \r\n",
       "L 558.767842 310.096656 \r\n",
       "L 562.205596 311.70091 \r\n",
       "L 565.643351 313.305163 \r\n",
       "L 569.081105 314.909417 \r\n",
       "L 572.51886 316.513671 \r\n",
       "L 575.956614 318.117924 \r\n",
       "L 579.394369 319.722178 \r\n",
       "L 582.832123 321.326431 \r\n",
       "L 586.269878 322.930685 \r\n",
       "L 589.707632 324.534939 \r\n",
       "L 593.145386 326.139192 \r\n",
       "L 596.583141 327.743446 \r\n",
       "L 600.020895 329.347699 \r\n",
       "L 603.45865 330.951953 \r\n",
       "L 606.896404 332.556207 \r\n",
       "L 610.334159 334.16046 \r\n",
       "L 613.771913 335.764714 \r\n",
       "L 617.209668 337.368967 \r\n",
       "L 620.647422 338.973221 \r\n",
       "L 624.085176 340.577475 \r\n",
       "L 627.522931 342.181728 \r\n",
       "L 630.960685 343.785982 \r\n",
       "L 634.39844 345.390235 \r\n",
       "L 637.836194 346.994489 \r\n",
       "L 641.273949 348.598743 \r\n",
       "L 644.711703 350.202996 \r\n",
       "L 648.149457 351.80725 \r\n",
       "L 651.587212 353.411503 \r\n",
       "L 655.024966 355.015757 \r\n",
       "L 658.462721 356.620011 \r\n",
       "L 661.900475 358.224264 \r\n",
       "L 665.33823 359.828518 \r\n",
       "L 668.775984 361.432771 \r\n",
       "L 672.213739 363.037025 \r\n",
       "L 675.651493 364.641279 \r\n",
       "L 679.089247 366.245532 \r\n",
       "L 682.527002 367.849786 \r\n",
       "L 685.964756 369.454039 \r\n",
       "L 689.402511 371.058293 \r\n",
       "L 692.840265 372.662547 \r\n",
       "L 696.27802 374.2668 \r\n",
       "\" style=\"fill:none;stroke:#2ca02c;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_88\">\r\n",
       "    <path clip-path=\"url(#p68fd379b60)\" d=\"M 527.828052 305.407495 \r\n",
       "L 531.265807 306.826051 \r\n",
       "L 534.703561 308.244607 \r\n",
       "L 538.141315 309.663163 \r\n",
       "L 541.57907 311.081719 \r\n",
       "L 545.016824 312.500276 \r\n",
       "L 548.454579 313.918832 \r\n",
       "L 551.892333 315.337388 \r\n",
       "L 555.330088 316.755944 \r\n",
       "L 558.767842 318.1745 \r\n",
       "L 562.205596 319.593056 \r\n",
       "L 565.643351 321.011612 \r\n",
       "L 569.081105 322.430168 \r\n",
       "L 572.51886 323.848724 \r\n",
       "L 575.956614 325.26728 \r\n",
       "L 579.394369 326.685836 \r\n",
       "L 582.832123 328.104392 \r\n",
       "L 586.269878 329.522948 \r\n",
       "L 589.707632 330.941504 \r\n",
       "L 593.145386 332.36006 \r\n",
       "L 596.583141 333.778616 \r\n",
       "L 600.020895 335.197172 \r\n",
       "L 603.45865 336.615728 \r\n",
       "L 606.896404 338.034284 \r\n",
       "L 610.334159 339.45284 \r\n",
       "L 613.771913 340.871397 \r\n",
       "L 617.209668 342.289953 \r\n",
       "L 620.647422 343.708509 \r\n",
       "L 624.085176 345.127065 \r\n",
       "L 627.522931 346.545621 \r\n",
       "L 630.960685 347.964177 \r\n",
       "L 634.39844 349.382733 \r\n",
       "L 637.836194 350.801289 \r\n",
       "L 641.273949 352.219845 \r\n",
       "L 644.711703 353.638401 \r\n",
       "L 648.149457 355.056957 \r\n",
       "L 651.587212 356.475513 \r\n",
       "L 655.024966 357.894069 \r\n",
       "L 658.462721 359.312625 \r\n",
       "L 661.900475 360.731181 \r\n",
       "L 665.33823 362.149737 \r\n",
       "L 668.775984 363.568293 \r\n",
       "L 672.213739 364.986849 \r\n",
       "L 675.651493 366.405405 \r\n",
       "L 679.089247 367.823961 \r\n",
       "L 682.527002 369.242518 \r\n",
       "L 685.964756 370.661074 \r\n",
       "L 689.402511 372.07963 \r\n",
       "L 692.840265 373.498186 \r\n",
       "L 696.27802 374.916742 \r\n",
       "\" style=\"fill:none;stroke:#d62728;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"line2d_89\">\r\n",
       "    <path clip-path=\"url(#p68fd379b60)\" d=\"M 527.828052 313.651608 \r\n",
       "L 531.265807 314.913133 \r\n",
       "L 534.703561 316.174658 \r\n",
       "L 538.141315 317.436184 \r\n",
       "L 541.57907 318.697709 \r\n",
       "L 545.016824 319.959234 \r\n",
       "L 548.454579 321.22076 \r\n",
       "L 551.892333 322.482285 \r\n",
       "L 555.330088 323.74381 \r\n",
       "L 558.767842 325.005336 \r\n",
       "L 562.205596 326.266861 \r\n",
       "L 565.643351 327.528386 \r\n",
       "L 569.081105 328.789912 \r\n",
       "L 572.51886 330.051437 \r\n",
       "L 575.956614 331.312962 \r\n",
       "L 579.394369 332.574488 \r\n",
       "L 582.832123 333.836013 \r\n",
       "L 586.269878 335.097538 \r\n",
       "L 589.707632 336.359064 \r\n",
       "L 593.145386 337.620589 \r\n",
       "L 596.583141 338.882114 \r\n",
       "L 600.020895 340.14364 \r\n",
       "L 603.45865 341.405165 \r\n",
       "L 606.896404 342.66669 \r\n",
       "L 610.334159 343.928216 \r\n",
       "L 613.771913 345.189741 \r\n",
       "L 617.209668 346.451266 \r\n",
       "L 620.647422 347.712792 \r\n",
       "L 624.085176 348.974317 \r\n",
       "L 627.522931 350.235843 \r\n",
       "L 630.960685 351.497368 \r\n",
       "L 634.39844 352.758893 \r\n",
       "L 637.836194 354.020419 \r\n",
       "L 641.273949 355.281944 \r\n",
       "L 644.711703 356.543469 \r\n",
       "L 648.149457 357.804995 \r\n",
       "L 651.587212 359.06652 \r\n",
       "L 655.024966 360.328045 \r\n",
       "L 658.462721 361.589571 \r\n",
       "L 661.900475 362.851096 \r\n",
       "L 665.33823 364.112621 \r\n",
       "L 668.775984 365.374147 \r\n",
       "L 672.213739 366.635672 \r\n",
       "L 675.651493 367.897197 \r\n",
       "L 679.089247 369.158723 \r\n",
       "L 682.527002 370.420248 \r\n",
       "L 685.964756 371.681773 \r\n",
       "L 689.402511 372.943299 \r\n",
       "L 692.840265 374.204824 \r\n",
       "L 696.27802 375.466349 \r\n",
       "\" style=\"fill:none;stroke:#9467bd;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_28\">\r\n",
       "    <path d=\"M 519.405554 386.85375 \r\n",
       "L 519.405554 233.468383 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_29\">\r\n",
       "    <path d=\"M 704.700518 386.85375 \r\n",
       "L 704.700518 233.468383 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_30\">\r\n",
       "    <path d=\"M 519.405554 386.85375 \r\n",
       "L 704.700518 386.85375 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"patch_31\">\r\n",
       "    <path d=\"M 519.405554 233.468383 \r\n",
       "L 704.700518 233.468383 \r\n",
       "\" style=\"fill:none;stroke:#000000;stroke-linecap:square;stroke-linejoin:miter;stroke-width:0.8;\"/>\r\n",
       "   </g>\r\n",
       "   <g id=\"legend_1\">\r\n",
       "    <g id=\"patch_32\">\r\n",
       "     <path d=\"M 606.153643 314.859008 \r\n",
       "L 697.700518 314.859008 \r\n",
       "Q 699.700518 314.859008 699.700518 312.859008 \r\n",
       "L 699.700518 240.468383 \r\n",
       "Q 699.700518 238.468383 697.700518 238.468383 \r\n",
       "L 606.153643 238.468383 \r\n",
       "Q 604.153643 238.468383 604.153643 240.468383 \r\n",
       "L 604.153643 312.859008 \r\n",
       "Q 604.153643 314.859008 606.153643 314.859008 \r\n",
       "z\r\n",
       "\" style=\"fill:#ffffff;opacity:0.8;stroke:#cccccc;stroke-linejoin:miter;\"/>\r\n",
       "    </g>\r\n",
       "    <g id=\"line2d_90\">\r\n",
       "     <path d=\"M 608.153643 246.566821 \r\n",
       "L 628.153643 246.566821 \r\n",
       "\" style=\"fill:none;stroke:#1f77b4;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "    </g>\r\n",
       "    <g id=\"line2d_91\"/>\r\n",
       "    <g id=\"text_72\">\r\n",
       "     <!-- power: 0.95 -->\r\n",
       "     <g transform=\"translate(636.153643 250.066821)scale(0.1 -0.1)\">\r\n",
       "      <defs>\r\n",
       "       <path d=\"M 4.203125 54.6875 \r\n",
       "L 13.1875 54.6875 \r\n",
       "L 24.421875 12.015625 \r\n",
       "L 35.59375 54.6875 \r\n",
       "L 46.1875 54.6875 \r\n",
       "L 57.421875 12.015625 \r\n",
       "L 68.609375 54.6875 \r\n",
       "L 77.59375 54.6875 \r\n",
       "L 63.28125 0 \r\n",
       "L 52.6875 0 \r\n",
       "L 40.921875 44.828125 \r\n",
       "L 29.109375 0 \r\n",
       "L 18.5 0 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-119\"/>\r\n",
       "       <path d=\"M 11.71875 12.40625 \r\n",
       "L 22.015625 12.40625 \r\n",
       "L 22.015625 0 \r\n",
       "L 11.71875 0 \r\n",
       "z\r\n",
       "M 11.71875 51.703125 \r\n",
       "L 22.015625 51.703125 \r\n",
       "L 22.015625 39.3125 \r\n",
       "L 11.71875 39.3125 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-58\"/>\r\n",
       "      </defs>\r\n",
       "      <use xlink:href=\"#DejaVuSans-112\"/>\r\n",
       "      <use x=\"63.476562\" xlink:href=\"#DejaVuSans-111\"/>\r\n",
       "      <use x=\"124.658203\" xlink:href=\"#DejaVuSans-119\"/>\r\n",
       "      <use x=\"206.445312\" xlink:href=\"#DejaVuSans-101\"/>\r\n",
       "      <use x=\"267.96875\" xlink:href=\"#DejaVuSans-114\"/>\r\n",
       "      <use x=\"307.332031\" xlink:href=\"#DejaVuSans-58\"/>\r\n",
       "      <use x=\"341.023438\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"372.810547\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      <use x=\"436.433594\" xlink:href=\"#DejaVuSans-46\"/>\r\n",
       "      <use x=\"468.220703\" xlink:href=\"#DejaVuSans-57\"/>\r\n",
       "      <use x=\"531.84375\" xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"line2d_92\">\r\n",
       "     <path d=\"M 608.153643 261.244946 \r\n",
       "L 628.153643 261.244946 \r\n",
       "\" style=\"fill:none;stroke:#ff7f0e;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "    </g>\r\n",
       "    <g id=\"line2d_93\"/>\r\n",
       "    <g id=\"text_73\">\r\n",
       "     <!-- power: 0.9 -->\r\n",
       "     <g transform=\"translate(636.153643 264.744946)scale(0.1 -0.1)\">\r\n",
       "      <use xlink:href=\"#DejaVuSans-112\"/>\r\n",
       "      <use x=\"63.476562\" xlink:href=\"#DejaVuSans-111\"/>\r\n",
       "      <use x=\"124.658203\" xlink:href=\"#DejaVuSans-119\"/>\r\n",
       "      <use x=\"206.445312\" xlink:href=\"#DejaVuSans-101\"/>\r\n",
       "      <use x=\"267.96875\" xlink:href=\"#DejaVuSans-114\"/>\r\n",
       "      <use x=\"307.332031\" xlink:href=\"#DejaVuSans-58\"/>\r\n",
       "      <use x=\"341.023438\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"372.810547\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      <use x=\"436.433594\" xlink:href=\"#DejaVuSans-46\"/>\r\n",
       "      <use x=\"468.220703\" xlink:href=\"#DejaVuSans-57\"/>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"line2d_94\">\r\n",
       "     <path d=\"M 608.153643 275.923071 \r\n",
       "L 628.153643 275.923071 \r\n",
       "\" style=\"fill:none;stroke:#2ca02c;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "    </g>\r\n",
       "    <g id=\"line2d_95\"/>\r\n",
       "    <g id=\"text_74\">\r\n",
       "     <!-- power: 0.8 -->\r\n",
       "     <g transform=\"translate(636.153643 279.423071)scale(0.1 -0.1)\">\r\n",
       "      <use xlink:href=\"#DejaVuSans-112\"/>\r\n",
       "      <use x=\"63.476562\" xlink:href=\"#DejaVuSans-111\"/>\r\n",
       "      <use x=\"124.658203\" xlink:href=\"#DejaVuSans-119\"/>\r\n",
       "      <use x=\"206.445312\" xlink:href=\"#DejaVuSans-101\"/>\r\n",
       "      <use x=\"267.96875\" xlink:href=\"#DejaVuSans-114\"/>\r\n",
       "      <use x=\"307.332031\" xlink:href=\"#DejaVuSans-58\"/>\r\n",
       "      <use x=\"341.023438\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"372.810547\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      <use x=\"436.433594\" xlink:href=\"#DejaVuSans-46\"/>\r\n",
       "      <use x=\"468.220703\" xlink:href=\"#DejaVuSans-56\"/>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"line2d_96\">\r\n",
       "     <path d=\"M 608.153643 290.601196 \r\n",
       "L 628.153643 290.601196 \r\n",
       "\" style=\"fill:none;stroke:#d62728;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "    </g>\r\n",
       "    <g id=\"line2d_97\"/>\r\n",
       "    <g id=\"text_75\">\r\n",
       "     <!-- power: 0.75 -->\r\n",
       "     <g transform=\"translate(636.153643 294.101196)scale(0.1 -0.1)\">\r\n",
       "      <use xlink:href=\"#DejaVuSans-112\"/>\r\n",
       "      <use x=\"63.476562\" xlink:href=\"#DejaVuSans-111\"/>\r\n",
       "      <use x=\"124.658203\" xlink:href=\"#DejaVuSans-119\"/>\r\n",
       "      <use x=\"206.445312\" xlink:href=\"#DejaVuSans-101\"/>\r\n",
       "      <use x=\"267.96875\" xlink:href=\"#DejaVuSans-114\"/>\r\n",
       "      <use x=\"307.332031\" xlink:href=\"#DejaVuSans-58\"/>\r\n",
       "      <use x=\"341.023438\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"372.810547\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      <use x=\"436.433594\" xlink:href=\"#DejaVuSans-46\"/>\r\n",
       "      <use x=\"468.220703\" xlink:href=\"#DejaVuSans-55\"/>\r\n",
       "      <use x=\"531.84375\" xlink:href=\"#DejaVuSans-53\"/>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "    <g id=\"line2d_98\">\r\n",
       "     <path d=\"M 608.153643 305.279321 \r\n",
       "L 628.153643 305.279321 \r\n",
       "\" style=\"fill:none;stroke:#9467bd;stroke-linecap:square;stroke-width:1.5;\"/>\r\n",
       "    </g>\r\n",
       "    <g id=\"line2d_99\"/>\r\n",
       "    <g id=\"text_76\">\r\n",
       "     <!-- power: 0.7 -->\r\n",
       "     <g transform=\"translate(636.153643 308.779321)scale(0.1 -0.1)\">\r\n",
       "      <use xlink:href=\"#DejaVuSans-112\"/>\r\n",
       "      <use x=\"63.476562\" xlink:href=\"#DejaVuSans-111\"/>\r\n",
       "      <use x=\"124.658203\" xlink:href=\"#DejaVuSans-119\"/>\r\n",
       "      <use x=\"206.445312\" xlink:href=\"#DejaVuSans-101\"/>\r\n",
       "      <use x=\"267.96875\" xlink:href=\"#DejaVuSans-114\"/>\r\n",
       "      <use x=\"307.332031\" xlink:href=\"#DejaVuSans-58\"/>\r\n",
       "      <use x=\"341.023438\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "      <use x=\"372.810547\" xlink:href=\"#DejaVuSans-48\"/>\r\n",
       "      <use x=\"436.433594\" xlink:href=\"#DejaVuSans-46\"/>\r\n",
       "      <use x=\"468.220703\" xlink:href=\"#DejaVuSans-55\"/>\r\n",
       "     </g>\r\n",
       "    </g>\r\n",
       "   </g>\r\n",
       "  </g>\r\n",
       "  <g id=\"text_77\">\r\n",
       "   <!-- Hiệu quả can thiệp giữa 2 thời điểm Post và Baseline -->\r\n",
       "   <g transform=\"translate(197.414688 17.54625)scale(0.12 -0.12)\">\r\n",
       "    <defs>\r\n",
       "     <path d=\"M 34.28125 27.484375 \r\n",
       "Q 23.390625 27.484375 19.1875 25 \r\n",
       "Q 14.984375 22.515625 14.984375 16.5 \r\n",
       "Q 14.984375 11.71875 18.140625 8.90625 \r\n",
       "Q 21.296875 6.109375 26.703125 6.109375 \r\n",
       "Q 34.1875 6.109375 38.703125 11.40625 \r\n",
       "Q 43.21875 16.703125 43.21875 25.484375 \r\n",
       "L 43.21875 27.484375 \r\n",
       "z\r\n",
       "M 52.203125 31.203125 \r\n",
       "L 52.203125 0 \r\n",
       "L 43.21875 0 \r\n",
       "L 43.21875 8.296875 \r\n",
       "Q 40.140625 3.328125 35.546875 0.953125 \r\n",
       "Q 30.953125 -1.421875 24.3125 -1.421875 \r\n",
       "Q 15.921875 -1.421875 10.953125 3.296875 \r\n",
       "Q 6 8.015625 6 15.921875 \r\n",
       "Q 6 25.140625 12.171875 29.828125 \r\n",
       "Q 18.359375 34.515625 30.609375 34.515625 \r\n",
       "L 43.21875 34.515625 \r\n",
       "L 43.21875 35.40625 \r\n",
       "Q 43.21875 41.609375 39.140625 45 \r\n",
       "Q 35.0625 48.390625 27.6875 48.390625 \r\n",
       "Q 23 48.390625 18.546875 47.265625 \r\n",
       "Q 14.109375 46.140625 10.015625 43.890625 \r\n",
       "L 10.015625 52.203125 \r\n",
       "Q 14.9375 54.109375 19.578125 55.046875 \r\n",
       "Q 24.21875 56 28.609375 56 \r\n",
       "Q 40.484375 56 46.34375 49.84375 \r\n",
       "Q 52.203125 43.703125 52.203125 31.203125 \r\n",
       "z\r\n",
       "M 19.28125 78.515625 \r\n",
       "Q 24.75 81 29.890625 81 \r\n",
       "Q 34.96875 81 38.0625 78.921875 \r\n",
       "Q 41.15625 76.859375 41.15625 73.578125 \r\n",
       "Q 41.15625 70.609375 36.859375 67.4375 \r\n",
       "L 34.71875 65.875 \r\n",
       "Q 33.015625 64.59375 32.8125 64.15625 \r\n",
       "Q 32.46875 63.375 32.46875 61.8125 \r\n",
       "L 26.65625 61.8125 \r\n",
       "L 26.65625 62.40625 \r\n",
       "Q 26.65625 64.359375 27.390625 65.671875 \r\n",
       "Q 28.125 67 30.609375 68.796875 \r\n",
       "L 32.8125 70.453125 \r\n",
       "Q 35.0625 72.125 35.0625 74.078125 \r\n",
       "Q 35.0625 75.09375 33.546875 75.96875 \r\n",
       "Q 32.03125 76.859375 28.5625 76.859375 \r\n",
       "Q 24.171875 76.859375 19.28125 74.3125 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-7843\"/>\r\n",
       "     <path d=\"M 31.0625 66.890625 \r\n",
       "L 28.265625 69.578125 \r\n",
       "Q 27.203125 70.5625 26.390625 71.015625 \r\n",
       "Q 25.59375 71.484375 24.953125 71.484375 \r\n",
       "Q 23.09375 71.484375 22.21875 69.703125 \r\n",
       "Q 21.34375 67.921875 21.234375 63.921875 \r\n",
       "L 15.140625 63.921875 \r\n",
       "Q 15.234375 70.515625 17.71875 74.09375 \r\n",
       "Q 20.21875 77.6875 24.65625 77.6875 \r\n",
       "Q 26.515625 77.6875 28.078125 77 \r\n",
       "Q 29.640625 76.3125 31.453125 74.703125 \r\n",
       "L 34.234375 72.015625 \r\n",
       "Q 35.296875 71.046875 36.109375 70.578125 \r\n",
       "Q 36.921875 70.125 37.546875 70.125 \r\n",
       "Q 39.40625 70.125 40.28125 71.90625 \r\n",
       "Q 41.15625 73.6875 41.265625 77.6875 \r\n",
       "L 47.359375 77.6875 \r\n",
       "Q 47.265625 71.09375 44.765625 67.5 \r\n",
       "Q 42.28125 63.921875 37.84375 63.921875 \r\n",
       "Q 35.984375 63.921875 34.421875 64.59375 \r\n",
       "Q 32.859375 65.28125 31.0625 66.890625 \r\n",
       "z\r\n",
       "M 48.34375 48.53125 \r\n",
       "L 48.34375 54.34375 \r\n",
       "Q 51.3125 52.140625 53.453125 51.09375 \r\n",
       "Q 55.609375 50.046875 57.125 50.046875 \r\n",
       "Q 59.375 50.046875 60.5 51.390625 \r\n",
       "Q 61.625 52.734375 61.625 55.359375 \r\n",
       "Q 61.625 56.921875 61.25 58.4375 \r\n",
       "Q 60.890625 59.953125 60.15625 61.46875 \r\n",
       "L 66.65625 61.46875 \r\n",
       "Q 67.140625 59.609375 67.375 57.953125 \r\n",
       "Q 67.625 56.296875 67.625 54.828125 \r\n",
       "Q 67.625 48.875 65.5 46.0625 \r\n",
       "Q 63.375 43.25 58.84375 43.25 \r\n",
       "Q 56.5 43.25 53.9375 44.546875 \r\n",
       "Q 51.375 45.84375 48.34375 48.53125 \r\n",
       "z\r\n",
       "M 8.59375 21.578125 \r\n",
       "L 8.59375 54.6875 \r\n",
       "L 17.578125 54.6875 \r\n",
       "L 17.578125 21.921875 \r\n",
       "Q 17.578125 14.15625 20.609375 10.265625 \r\n",
       "Q 23.640625 6.390625 29.6875 6.390625 \r\n",
       "Q 36.96875 6.390625 41.1875 11.03125 \r\n",
       "Q 45.40625 15.671875 45.40625 23.6875 \r\n",
       "L 45.40625 54.6875 \r\n",
       "L 54.390625 54.6875 \r\n",
       "L 54.390625 0 \r\n",
       "L 45.40625 0 \r\n",
       "L 45.40625 8.40625 \r\n",
       "Q 42.140625 3.421875 37.8125 1 \r\n",
       "Q 33.5 -1.421875 27.78125 -1.421875 \r\n",
       "Q 18.359375 -1.421875 13.46875 4.4375 \r\n",
       "Q 8.59375 10.296875 8.59375 21.578125 \r\n",
       "z\r\n",
       "M 31.203125 56 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-7919\"/>\r\n",
       "     <path d=\"M 23.53125 79.984375 \r\n",
       "L 37.3125 61.71875 \r\n",
       "L 29.828125 61.71875 \r\n",
       "L 13.921875 79.984375 \r\n",
       "z\r\n",
       "M 41.015625 48.53125 \r\n",
       "L 41.015625 54.34375 \r\n",
       "Q 44 52.140625 46.140625 51.09375 \r\n",
       "Q 48.296875 50.046875 49.8125 50.046875 \r\n",
       "Q 52.046875 50.046875 53.171875 51.390625 \r\n",
       "Q 54.296875 52.734375 54.296875 55.359375 \r\n",
       "Q 54.296875 56.921875 53.921875 58.4375 \r\n",
       "Q 53.5625 59.953125 52.828125 61.46875 \r\n",
       "L 59.328125 61.46875 \r\n",
       "Q 59.8125 59.609375 60.046875 57.953125 \r\n",
       "Q 60.296875 56.296875 60.296875 54.828125 \r\n",
       "Q 60.296875 48.875 58.171875 46.0625 \r\n",
       "Q 56.0625 43.25 51.515625 43.25 \r\n",
       "Q 49.171875 43.25 46.609375 44.546875 \r\n",
       "Q 44.046875 45.84375 41.015625 48.53125 \r\n",
       "z\r\n",
       "M 30.859375 48.390625 \r\n",
       "Q 23.640625 48.390625 19.4375 42.75 \r\n",
       "Q 15.234375 37.109375 15.234375 27.296875 \r\n",
       "Q 15.234375 17.484375 19.40625 11.84375 \r\n",
       "Q 23.578125 6.203125 30.859375 6.203125 \r\n",
       "Q 38.03125 6.203125 42.234375 11.859375 \r\n",
       "Q 46.4375 17.53125 46.4375 27.296875 \r\n",
       "Q 46.4375 37.015625 42.234375 42.703125 \r\n",
       "Q 38.03125 48.390625 30.859375 48.390625 \r\n",
       "z\r\n",
       "M 30.859375 56 \r\n",
       "Q 42.578125 56 49.265625 48.375 \r\n",
       "Q 55.953125 40.765625 55.953125 27.296875 \r\n",
       "Q 55.953125 13.875 49.265625 6.21875 \r\n",
       "Q 42.578125 -1.421875 30.859375 -1.421875 \r\n",
       "Q 19.09375 -1.421875 12.421875 6.21875 \r\n",
       "Q 5.765625 13.875 5.765625 27.296875 \r\n",
       "Q 5.765625 40.765625 12.421875 48.375 \r\n",
       "Q 19.09375 56 30.859375 56 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-7901\"/>\r\n",
       "     <path d=\"M 56.203125 29.59375 \r\n",
       "L 56.203125 25.203125 \r\n",
       "L 14.890625 25.203125 \r\n",
       "Q 15.484375 15.921875 20.484375 11.0625 \r\n",
       "Q 25.484375 6.203125 34.421875 6.203125 \r\n",
       "Q 39.59375 6.203125 44.453125 7.46875 \r\n",
       "Q 49.3125 8.734375 54.109375 11.28125 \r\n",
       "L 54.109375 2.78125 \r\n",
       "Q 49.265625 0.734375 44.1875 -0.34375 \r\n",
       "Q 39.109375 -1.421875 33.890625 -1.421875 \r\n",
       "Q 20.796875 -1.421875 13.15625 6.1875 \r\n",
       "Q 5.515625 13.8125 5.515625 26.8125 \r\n",
       "Q 5.515625 40.234375 12.765625 48.109375 \r\n",
       "Q 20.015625 56 32.328125 56 \r\n",
       "Q 43.359375 56 49.78125 48.890625 \r\n",
       "Q 56.203125 41.796875 56.203125 29.59375 \r\n",
       "z\r\n",
       "M 47.21875 32.234375 \r\n",
       "Q 47.125 39.59375 43.09375 43.984375 \r\n",
       "Q 39.0625 48.390625 32.421875 48.390625 \r\n",
       "Q 24.90625 48.390625 20.390625 44.140625 \r\n",
       "Q 15.875 39.890625 15.1875 32.171875 \r\n",
       "z\r\n",
       "M 38.625 83.734375 \r\n",
       "Q 44.09375 86.21875 49.21875 86.21875 \r\n",
       "Q 54.296875 86.21875 57.390625 84.140625 \r\n",
       "Q 60.5 82.078125 60.5 78.796875 \r\n",
       "Q 60.5 75.828125 56.203125 72.65625 \r\n",
       "L 54.046875 71.09375 \r\n",
       "Q 52.34375 69.8125 52.15625 69.375 \r\n",
       "Q 51.8125 68.59375 51.8125 67.03125 \r\n",
       "L 46 67.03125 \r\n",
       "L 46 67.625 \r\n",
       "Q 46 69.578125 46.734375 70.890625 \r\n",
       "Q 47.46875 72.21875 49.953125 74.015625 \r\n",
       "L 52.15625 75.671875 \r\n",
       "Q 54.390625 77.34375 54.390625 79.296875 \r\n",
       "Q 54.390625 80.3125 52.875 81.1875 \r\n",
       "Q 51.375 82.078125 47.90625 82.078125 \r\n",
       "Q 43.5 82.078125 38.625 79.53125 \r\n",
       "z\r\n",
       "M 27.25 74.609375 \r\n",
       "L 36.421875 74.609375 \r\n",
       "L 46.734375 61.625 \r\n",
       "L 39.9375 61.625 \r\n",
       "L 31.84375 70.3125 \r\n",
       "L 23.734375 61.625 \r\n",
       "L 16.9375 61.625 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-7875\"/>\r\n",
       "     <path d=\"M 19.671875 64.796875 \r\n",
       "L 19.671875 37.40625 \r\n",
       "L 32.078125 37.40625 \r\n",
       "Q 38.96875 37.40625 42.71875 40.96875 \r\n",
       "Q 46.484375 44.53125 46.484375 51.125 \r\n",
       "Q 46.484375 57.671875 42.71875 61.234375 \r\n",
       "Q 38.96875 64.796875 32.078125 64.796875 \r\n",
       "z\r\n",
       "M 9.8125 72.90625 \r\n",
       "L 32.078125 72.90625 \r\n",
       "Q 44.34375 72.90625 50.609375 67.359375 \r\n",
       "Q 56.890625 61.8125 56.890625 51.125 \r\n",
       "Q 56.890625 40.328125 50.609375 34.8125 \r\n",
       "Q 44.34375 29.296875 32.078125 29.296875 \r\n",
       "L 19.671875 29.296875 \r\n",
       "L 19.671875 0 \r\n",
       "L 9.8125 0 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-80\"/>\r\n",
       "     <path d=\"M 2.984375 54.6875 \r\n",
       "L 12.5 54.6875 \r\n",
       "L 29.59375 8.796875 \r\n",
       "L 46.6875 54.6875 \r\n",
       "L 56.203125 54.6875 \r\n",
       "L 35.6875 0 \r\n",
       "L 23.484375 0 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-118\"/>\r\n",
       "     <path d=\"M 34.28125 27.484375 \r\n",
       "Q 23.390625 27.484375 19.1875 25 \r\n",
       "Q 14.984375 22.515625 14.984375 16.5 \r\n",
       "Q 14.984375 11.71875 18.140625 8.90625 \r\n",
       "Q 21.296875 6.109375 26.703125 6.109375 \r\n",
       "Q 34.1875 6.109375 38.703125 11.40625 \r\n",
       "Q 43.21875 16.703125 43.21875 25.484375 \r\n",
       "L 43.21875 27.484375 \r\n",
       "z\r\n",
       "M 52.203125 31.203125 \r\n",
       "L 52.203125 0 \r\n",
       "L 43.21875 0 \r\n",
       "L 43.21875 8.296875 \r\n",
       "Q 40.140625 3.328125 35.546875 0.953125 \r\n",
       "Q 30.953125 -1.421875 24.3125 -1.421875 \r\n",
       "Q 15.921875 -1.421875 10.953125 3.296875 \r\n",
       "Q 6 8.015625 6 15.921875 \r\n",
       "Q 6 25.140625 12.171875 29.828125 \r\n",
       "Q 18.359375 34.515625 30.609375 34.515625 \r\n",
       "L 43.21875 34.515625 \r\n",
       "L 43.21875 35.40625 \r\n",
       "Q 43.21875 41.609375 39.140625 45 \r\n",
       "Q 35.0625 48.390625 27.6875 48.390625 \r\n",
       "Q 23 48.390625 18.546875 47.265625 \r\n",
       "Q 14.109375 46.140625 10.015625 43.890625 \r\n",
       "L 10.015625 52.203125 \r\n",
       "Q 14.9375 54.109375 19.578125 55.046875 \r\n",
       "Q 24.21875 56 28.609375 56 \r\n",
       "Q 40.484375 56 46.34375 49.84375 \r\n",
       "Q 52.203125 43.703125 52.203125 31.203125 \r\n",
       "z\r\n",
       "M 21.921875 79.984375 \r\n",
       "L 35.6875 61.71875 \r\n",
       "L 28.21875 61.71875 \r\n",
       "L 12.3125 79.984375 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-224\"/>\r\n",
       "     <path d=\"M 19.671875 34.8125 \r\n",
       "L 19.671875 8.109375 \r\n",
       "L 35.5 8.109375 \r\n",
       "Q 43.453125 8.109375 47.28125 11.40625 \r\n",
       "Q 51.125 14.703125 51.125 21.484375 \r\n",
       "Q 51.125 28.328125 47.28125 31.5625 \r\n",
       "Q 43.453125 34.8125 35.5 34.8125 \r\n",
       "z\r\n",
       "M 19.671875 64.796875 \r\n",
       "L 19.671875 42.828125 \r\n",
       "L 34.28125 42.828125 \r\n",
       "Q 41.5 42.828125 45.03125 45.53125 \r\n",
       "Q 48.578125 48.25 48.578125 53.8125 \r\n",
       "Q 48.578125 59.328125 45.03125 62.0625 \r\n",
       "Q 41.5 64.796875 34.28125 64.796875 \r\n",
       "z\r\n",
       "M 9.8125 72.90625 \r\n",
       "L 35.015625 72.90625 \r\n",
       "Q 46.296875 72.90625 52.390625 68.21875 \r\n",
       "Q 58.5 63.53125 58.5 54.890625 \r\n",
       "Q 58.5 48.1875 55.375 44.234375 \r\n",
       "Q 52.25 40.28125 46.1875 39.3125 \r\n",
       "Q 53.46875 37.75 57.5 32.78125 \r\n",
       "Q 61.53125 27.828125 61.53125 20.40625 \r\n",
       "Q 61.53125 10.640625 54.890625 5.3125 \r\n",
       "Q 48.25 0 35.984375 0 \r\n",
       "L 9.8125 0 \r\n",
       "z\r\n",
       "\" id=\"DejaVuSans-66\"/>\r\n",
       "    </defs>\r\n",
       "    <use xlink:href=\"#DejaVuSans-72\"/>\r\n",
       "    <use x=\"75.195312\" xlink:href=\"#DejaVuSans-105\"/>\r\n",
       "    <use x=\"102.978516\" xlink:href=\"#DejaVuSans-7879\"/>\r\n",
       "    <use x=\"164.501953\" xlink:href=\"#DejaVuSans-117\"/>\r\n",
       "    <use x=\"227.880859\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "    <use x=\"259.667969\" xlink:href=\"#DejaVuSans-113\"/>\r\n",
       "    <use x=\"323.144531\" xlink:href=\"#DejaVuSans-117\"/>\r\n",
       "    <use x=\"386.523438\" xlink:href=\"#DejaVuSans-7843\"/>\r\n",
       "    <use x=\"447.802734\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "    <use x=\"479.589844\" xlink:href=\"#DejaVuSans-99\"/>\r\n",
       "    <use x=\"534.570312\" xlink:href=\"#DejaVuSans-97\"/>\r\n",
       "    <use x=\"595.849609\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "    <use x=\"659.228516\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "    <use x=\"691.015625\" xlink:href=\"#DejaVuSans-116\"/>\r\n",
       "    <use x=\"730.224609\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "    <use x=\"793.603516\" xlink:href=\"#DejaVuSans-105\"/>\r\n",
       "    <use x=\"821.386719\" xlink:href=\"#DejaVuSans-7879\"/>\r\n",
       "    <use x=\"882.910156\" xlink:href=\"#DejaVuSans-112\"/>\r\n",
       "    <use x=\"946.386719\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "    <use x=\"978.173828\" xlink:href=\"#DejaVuSans-103\"/>\r\n",
       "    <use x=\"1041.650391\" xlink:href=\"#DejaVuSans-105\"/>\r\n",
       "    <use x=\"1069.433594\" xlink:href=\"#DejaVuSans-7919\"/>\r\n",
       "    <use x=\"1132.8125\" xlink:href=\"#DejaVuSans-97\"/>\r\n",
       "    <use x=\"1194.091797\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "    <use x=\"1225.878906\" xlink:href=\"#DejaVuSans-50\"/>\r\n",
       "    <use x=\"1289.501953\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "    <use x=\"1321.289062\" xlink:href=\"#DejaVuSans-116\"/>\r\n",
       "    <use x=\"1360.498047\" xlink:href=\"#DejaVuSans-104\"/>\r\n",
       "    <use x=\"1423.876953\" xlink:href=\"#DejaVuSans-7901\"/>\r\n",
       "    <use x=\"1485.058594\" xlink:href=\"#DejaVuSans-105\"/>\r\n",
       "    <use x=\"1512.841797\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "    <use x=\"1544.628906\" xlink:href=\"#DejaVuSans-273\"/>\r\n",
       "    <use x=\"1608.105469\" xlink:href=\"#DejaVuSans-105\"/>\r\n",
       "    <use x=\"1635.888672\" xlink:href=\"#DejaVuSans-7875\"/>\r\n",
       "    <use x=\"1697.412109\" xlink:href=\"#DejaVuSans-109\"/>\r\n",
       "    <use x=\"1794.824219\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "    <use x=\"1826.611328\" xlink:href=\"#DejaVuSans-80\"/>\r\n",
       "    <use x=\"1883.289062\" xlink:href=\"#DejaVuSans-111\"/>\r\n",
       "    <use x=\"1944.470703\" xlink:href=\"#DejaVuSans-115\"/>\r\n",
       "    <use x=\"1996.570312\" xlink:href=\"#DejaVuSans-116\"/>\r\n",
       "    <use x=\"2035.779297\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "    <use x=\"2067.566406\" xlink:href=\"#DejaVuSans-118\"/>\r\n",
       "    <use x=\"2126.746094\" xlink:href=\"#DejaVuSans-224\"/>\r\n",
       "    <use x=\"2188.025391\" xlink:href=\"#DejaVuSans-32\"/>\r\n",
       "    <use x=\"2219.8125\" xlink:href=\"#DejaVuSans-66\"/>\r\n",
       "    <use x=\"2288.416016\" xlink:href=\"#DejaVuSans-97\"/>\r\n",
       "    <use x=\"2349.695312\" xlink:href=\"#DejaVuSans-115\"/>\r\n",
       "    <use x=\"2401.794922\" xlink:href=\"#DejaVuSans-101\"/>\r\n",
       "    <use x=\"2463.318359\" xlink:href=\"#DejaVuSans-108\"/>\r\n",
       "    <use x=\"2491.101562\" xlink:href=\"#DejaVuSans-105\"/>\r\n",
       "    <use x=\"2518.884766\" xlink:href=\"#DejaVuSans-110\"/>\r\n",
       "    <use x=\"2582.263672\" xlink:href=\"#DejaVuSans-101\"/>\r\n",
       "   </g>\r\n",
       "  </g>\r\n",
       " </g>\r\n",
       " <defs>\r\n",
       "  <clipPath id=\"p8fca3177a8\">\r\n",
       "   <rect height=\"153.385367\" width=\"185.294964\" x=\"46.965625\" y=\"34.12875\"/>\r\n",
       "  </clipPath>\r\n",
       "  <clipPath id=\"pcb3b07f7aa\">\r\n",
       "   <rect height=\"153.385367\" width=\"185.294964\" x=\"283.185589\" y=\"34.12875\"/>\r\n",
       "  </clipPath>\r\n",
       "  <clipPath id=\"pb0fba2eb70\">\r\n",
       "   <rect height=\"153.385367\" width=\"185.294964\" x=\"519.405554\" y=\"34.12875\"/>\r\n",
       "  </clipPath>\r\n",
       "  <clipPath id=\"p87f20bf072\">\r\n",
       "   <rect height=\"153.385367\" width=\"185.294964\" x=\"46.965625\" y=\"233.468383\"/>\r\n",
       "  </clipPath>\r\n",
       "  <clipPath id=\"p1c2664de10\">\r\n",
       "   <rect height=\"153.385367\" width=\"185.294964\" x=\"283.185589\" y=\"233.468383\"/>\r\n",
       "  </clipPath>\r\n",
       "  <clipPath id=\"p68fd379b60\">\r\n",
       "   <rect height=\"153.385367\" width=\"185.294964\" x=\"519.405554\" y=\"233.468383\"/>\r\n",
       "  </clipPath>\r\n",
       " </defs>\r\n",
       "</svg>\r\n"
      ],
      "text/plain": [
       "<Figure size 720x432 with 6 Axes>"
      ]
     },
     "metadata": {
      "needs_background": "light"
     },
     "output_type": "display_data"
    }
   ],
   "source": [
    "plot_ss_paired(mu1 = 4,\n",
    "                mu2 = 7.5,\n",
    "                sigma1 = 3.5,\n",
    "                sigma2 = 5,\n",
    "                rho = 0.5,\n",
    "                alpha = 0.05,\n",
    "                beta = 0.2,\n",
    "                y_name = 'Biomarker Y', \n",
    "                g=['Baseline','Post'])"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Dựa vào kết quả mô phỏng cho thí dụ trên, ta có thể nhận xét:\n",
    "    \n",
    "Hiệu ứng điều trị càng nhỏ bé, khó phát hiện, càng cần nhiều bệnh nhân.\n",
    "\n",
    "Độ lệch chuẩn (sự phân tán của thay đổi theo thời gian) càng cao, cỡ mẫu càng tăng; \n",
    "\n",
    "Khuynh hướng thay đổi càng đồng nhất trong phân nhóm can thiệp (toàn bộ bệnh nhân đều đáp ứng điều trị), thì rho càng gần 1, và cỡ mẫu cần thiết càng giảm; ngược lại độ phân tán ngẫu nhiên càng cao (đáp ứng hỗn loạn tùy theo cá thể) thì rho càng thấp, cỡ mẫu càng tăng. \n",
    "\n",
    "Thông thường, mu1/sigma1 và mu2/sigma2 dễ dàng trích xuất từ y văn; nhưng rho thì chỉ có thể giả định và mô phỏng, vì không được trình bày trong y văn, trừ khi ta có dữ liệu gốc hay ước tính rho trực quan từ biểu đồ individual line plot/boxplot của nghiên cứu này.\n",
    "\n",
    "Bài thực hành đã hết, các bạn lại có thêm trong tay một công cụ để ước tính cỡ mẫu cho thí nghiệm can thiệp đối chứng ngẫu nhiên 2 phân nhóm/2 thời điểm, rất thông dụng trong nghiên cứu y học."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Tài liệu tham khảo:\n",
    "    \n",
    "1) Rosner, B. Fundamentals of Biostatistics. Sixth edition. Thomson Brooks/Cole. 2006. \n",
    "\n",
    "2) Source code từ R package powerMediation của Weiliang Qiu (2015)\n",
    "https://cran.r-project.org/web/packages/powerMediation/index.html"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3",
   "language": "python",
   "name": "python3"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.8.5"
  },
  "toc": {
   "base_numbering": 1,
   "nav_menu": {},
   "number_sections": true,
   "sideBar": true,
   "skip_h1_title": false,
   "title_cell": "Table of Contents",
   "title_sidebar": "Contents",
   "toc_cell": false,
   "toc_position": {},
   "toc_section_display": true,
   "toc_window_display": false
  }
 },
 "nbformat": 4,
 "nbformat_minor": 4
}