diff --git a/machine_learning/3_classification/lecture/week4/.ipynb_checkpoints/quiz-Handling Missing Data-checkpoint.ipynb b/machine_learning/3_classification/lecture/week4/.ipynb_checkpoints/quiz-Handling Missing Data-checkpoint.ipynb
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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Handling Missing Data"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Question 1"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<img src=\"images/lec4_quiz02_pic01.png\">\n",
+    "\n",
+    "*Screenshot taken from [Coursera](https://www.coursera.org/learn/ml-classification/exam/fEDCt/handling-missing-data)*\n",
+    "\n",
+    "<!--TEASER_END-->"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Question 2"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<img src=\"images/lec4_quiz02_pic02.png\">\n",
+    "\n",
+    "*Screenshot taken from [Coursera](https://www.coursera.org/learn/ml-classification/exam/fEDCt/handling-missing-data)*\n",
+    "\n",
+    "<!--TEASER_END-->"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Question 3"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<img src=\"images/lec4_quiz02_pic03.png\">\n",
+    "\n",
+    "*Screenshot taken from [Coursera](https://www.coursera.org/learn/ml-classification/exam/fEDCt/handling-missing-data)*\n",
+    "\n",
+    "<!--TEASER_END-->"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Question 4"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<img src=\"images/lec4_quiz02_pic04.png\">\n",
+    "\n",
+    "*Screenshot taken from [Coursera](https://www.coursera.org/learn/ml-classification/exam/fEDCt/handling-missing-data)*\n",
+    "\n",
+    "<!--TEASER_END-->"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Question 5"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<img src=\"images/lec4_quiz02_pic05.png\">\n",
+    "\n",
+    "*Screenshot taken from [Coursera](https://www.coursera.org/learn/ml-classification/exam/fEDCt/handling-missing-data)*\n",
+    "\n",
+    "<!--TEASER_END-->"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Question 6"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<img src=\"images/lec4_quiz02_pic06.png\">\n",
+    "\n",
+    "*Screenshot taken from [Coursera](https://www.coursera.org/learn/ml-classification/exam/fEDCt/handling-missing-data)*\n",
+    "\n",
+    "<!--TEASER_END-->"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Question 7"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<img src=\"images/lec4_quiz02_pic07.png\">\n",
+    "\n",
+    "*Screenshot taken from [Coursera](https://www.coursera.org/learn/ml-classification/exam/fEDCt/handling-missing-data)*\n",
+    "\n",
+    "<!--TEASER_END-->"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 2",
+   "language": "python",
+   "name": "python2"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.10"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}
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diff --git a/machine_learning/3_classification/lecture/week4/quiz-Handling Missing Data.ipynb b/machine_learning/3_classification/lecture/week4/quiz-Handling Missing Data.ipynb
new file mode 100644
index 0000000..f3f83a9
--- /dev/null
+++ b/machine_learning/3_classification/lecture/week4/quiz-Handling Missing Data.ipynb	
@@ -0,0 +1,158 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Handling Missing Data"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Question 1"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<img src=\"images/lec4_quiz02_pic01.png\">\n",
+    "\n",
+    "*Screenshot taken from [Coursera](https://www.coursera.org/learn/ml-classification/exam/fEDCt/handling-missing-data)*\n",
+    "\n",
+    "<!--TEASER_END-->"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Question 2"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<img src=\"images/lec4_quiz02_pic02.png\">\n",
+    "\n",
+    "*Screenshot taken from [Coursera](https://www.coursera.org/learn/ml-classification/exam/fEDCt/handling-missing-data)*\n",
+    "\n",
+    "<!--TEASER_END-->"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Question 3"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<img src=\"images/lec4_quiz02_pic03.png\">\n",
+    "\n",
+    "*Screenshot taken from [Coursera](https://www.coursera.org/learn/ml-classification/exam/fEDCt/handling-missing-data)*\n",
+    "\n",
+    "<!--TEASER_END-->"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Question 4"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<img src=\"images/lec4_quiz02_pic04.png\">\n",
+    "\n",
+    "*Screenshot taken from [Coursera](https://www.coursera.org/learn/ml-classification/exam/fEDCt/handling-missing-data)*\n",
+    "\n",
+    "<!--TEASER_END-->"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Question 5"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<img src=\"images/lec4_quiz02_pic05.png\">\n",
+    "\n",
+    "*Screenshot taken from [Coursera](https://www.coursera.org/learn/ml-classification/exam/fEDCt/handling-missing-data)*\n",
+    "\n",
+    "<!--TEASER_END-->"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Question 6"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<img src=\"images/lec4_quiz02_pic06.png\">\n",
+    "\n",
+    "*Screenshot taken from [Coursera](https://www.coursera.org/learn/ml-classification/exam/fEDCt/handling-missing-data)*\n",
+    "\n",
+    "<!--TEASER_END-->"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Question 7"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<img src=\"images/lec4_quiz02_pic07.png\">\n",
+    "\n",
+    "*Screenshot taken from [Coursera](https://www.coursera.org/learn/ml-classification/exam/fEDCt/handling-missing-data)*\n",
+    "\n",
+    "<!--TEASER_END-->"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 2",
+   "language": "python",
+   "name": "python2"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.10"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}