work on stat desc

Sport/Descriptive_statistics/stat_desc_sport.ipynb

@@ -146,6 +146,17 @@
     "    "
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "866a137c-7385-4f12-9349-b0202c71dff3",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Construct dataset concerning only customer after start date\n",
+    "\n"
+   ]
+  },
   {
    "cell_type": "markdown",
    "id": "62922029-8071-402e-8115-c145a2874a2f",