diff --git a/module2/exo2/exercice.ipynb b/module2/exo2/exercice.ipynb
index 32fa9ddfdef004de7e59dc5804b20284f359f3be..ff2858946692034c97fe831a28e74ab6b9b2cee9 100644
--- a/module2/exo2/exercice.ipynb
+++ b/module2/exo2/exercice.ipynb
@@ -25,22 +25,22 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 10,
+   "execution_count": 19,
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "4.334094455301447"
+       "4.33"
       ]
      },
-     "execution_count": 10,
+     "execution_count": 19,
      "metadata": {},
      "output_type": "execute_result"
     }
    ],
    "source": [
-    "np.std(x,ddof=1)"
+    "np.round (np.std(x,ddof=1),2)"
    ]
   },
   {