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				@@ -4,15 +4,13 @@ 
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				    "cell_type": "markdown", 
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				    "metadata": {}, 
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				    "source": [ 
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				-    "# Introduction to the data" 
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				+    "# Introduction to the Data" 
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				    ] 
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				   }, 
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				   { 
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				    "cell_type": "code", 
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				    "execution_count": 36, 
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				-   "metadata": { 
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				-    "collapsed": false 
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				-   }, 
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				+   "metadata": {}, 
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				    "outputs": [ 
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				     { 
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				      "name": "stdout", 
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				@@ -36,9 +34,7 @@ 
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				   { 
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				    "cell_type": "code", 
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				    "execution_count": 37, 
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				-   "metadata": { 
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				-    "collapsed": false 
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				-   }, 
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				+   "metadata": {}, 
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				    "outputs": [ 
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				     { 
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				      "name": "stdout", 
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				@@ -57,7 +53,6 @@ 
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				    "cell_type": "code", 
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				    "execution_count": 38, 
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				    "metadata": { 
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				-    "collapsed": false, 
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				     "scrolled": true 
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				    }, 
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				    "outputs": [ 
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				@@ -459,9 +454,7 @@ 
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				   { 
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				    "cell_type": "code", 
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				    "execution_count": 22, 
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				-   "metadata": { 
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				-    "collapsed": false 
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				-   }, 
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				+   "metadata": {}, 
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				    "outputs": [ 
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				     { 
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				      "data": { 
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				@@ -498,14 +491,13 @@ 
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				    "cell_type": "markdown", 
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				    "metadata": {}, 
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				    "source": [ 
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				-    "# Data cleaning" 
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				+    "# Data Cleaning" 
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				    ] 
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				   }, 
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				   { 
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				    "cell_type": "code", 
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				    "execution_count": 39, 
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				    "metadata": { 
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				-    "collapsed": false, 
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				     "scrolled": true 
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				    }, 
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				    "outputs": [], 
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				@@ -520,7 +512,6 @@ 
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				    "cell_type": "code", 
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				    "execution_count": 40, 
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				    "metadata": { 
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				-    "collapsed": false, 
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				     "scrolled": true 
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				    }, 
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				    "outputs": [], 
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				@@ -533,7 +524,6 @@ 
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				    "cell_type": "code", 
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				    "execution_count": 41, 
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				    "metadata": { 
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				-    "collapsed": false, 
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				     "scrolled": true 
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				    }, 
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				    "outputs": [], 
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				@@ -559,7 +549,6 @@ 
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				    "cell_type": "code", 
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				    "execution_count": 45, 
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				    "metadata": { 
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				-    "collapsed": false, 
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				     "scrolled": true 
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				    }, 
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				    "outputs": [ 
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				@@ -986,15 +975,13 @@ 
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				    "cell_type": "markdown", 
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				    "metadata": {}, 
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				    "source": [ 
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				-    "# Data visualization, line plots" 
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				+    "# Data Visualization, Line Plots" 
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				    ] 
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				   }, 
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				   { 
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				    "cell_type": "code", 
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				    "execution_count": 59, 
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				-   "metadata": { 
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				-    "collapsed": false 
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				-   }, 
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				+   "metadata": {}, 
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				    "outputs": [ 
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				     { 
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				      "data": { 
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				@@ -1025,9 +1012,7 @@ 
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				   { 
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				    "cell_type": "code", 
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				    "execution_count": 60, 
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				-   "metadata": { 
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				-    "collapsed": false 
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				-   }, 
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				+   "metadata": {}, 
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				    "outputs": [ 
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				     { 
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				      "data": { 
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				@@ -1058,15 +1043,13 @@ 
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				    "cell_type": "markdown", 
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				    "metadata": {}, 
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				    "source": [ 
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				-    "# Data visualization, box plot" 
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				+    "# Data Visualization, Box Plot" 
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				    ] 
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				   }, 
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				   { 
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				    "cell_type": "code", 
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				    "execution_count": 66, 
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				-   "metadata": { 
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				-    "collapsed": false 
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				-   }, 
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				+   "metadata": {}, 
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				    "outputs": [ 
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				     { 
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				      "data": { 
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				@@ -1096,9 +1079,7 @@ 
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				   { 
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				    "cell_type": "code", 
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				    "execution_count": 68, 
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				-   "metadata": { 
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				-    "collapsed": false 
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				-   }, 
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				+   "metadata": {}, 
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				    "outputs": [ 
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				     { 
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				      "data": { 
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				@@ -1129,14 +1110,13 @@ 
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				    "cell_type": "markdown", 
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				    "metadata": {}, 
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				    "source": [ 
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				-    "# Data visualization, stacked bar plots" 
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				+    "# Data Visualization, Stacked Bar Plots" 
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				    ] 
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				   }, 
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				   { 
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				    "cell_type": "code", 
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				    "execution_count": 96, 
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				    "metadata": { 
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				-    "collapsed": false, 
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				     "scrolled": false 
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				    }, 
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				    "outputs": [ 
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				@@ -1170,14 +1150,13 @@ 
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				    "cell_type": "markdown", 
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				    "metadata": {}, 
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				    "source": [ 
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				-    "# Next steps" 
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				+    "# Next Steps" 
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				    ] 
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				   }, 
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				   { 
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				    "cell_type": "code", 
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				    "execution_count": 65, 
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				    "metadata": { 
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				-    "collapsed": false, 
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				     "scrolled": false 
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				    }, 
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				    "outputs": [ 
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				@@ -1224,9 +1203,9 @@ 
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				    "name": "python", 
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				    "nbconvert_exporter": "python", 
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				    "pygments_lexer": "ipython3", 
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				-   "version": "3.4.3" 
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				+   "version": "3.8.5" 
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				   } 
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				  }, 
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				  "nbformat": 4, 
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				- "nbformat_minor": 0 
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				+ "nbformat_minor": 1 
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				 } 
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