diff --git a/module2/exo2/exercice.ipynb b/module2/exo2/exercice.ipynb
index a1bd20b5c7eaf386db7e7cffb12fab5b9396d5dc..389ce504253efe38b370740967cb04225a54b87b 100644
--- a/module2/exo2/exercice.ipynb
+++ b/module2/exo2/exercice.ipynb
@@ -90,6 +90,24 @@
     "print(médiane_A)"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": 11,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "4.312369534258399\n"
+     ]
+    }
+   ],
+   "source": [
+    "écartype_A = np.nanstd(A)\n",
+    "print(écartype_A)"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,