diff --git a/ML/2_linear_reg_multivariate/Exercise/exercise_answer.ipynb b/ML/2_linear_reg_multivariate/Exercise/exercise_answer.ipynb
index a270ce7a..91daa0d3 100644
--- a/ML/2_linear_reg_multivariate/Exercise/exercise_answer.ipynb
+++ b/ML/2_linear_reg_multivariate/Exercise/exercise_answer.ipynb
@@ -379,7 +379,7 @@
    ],
    "source": [
     "import math\n",
-    "median_test_score = math.floor(d['test_score(out of 10)'].mean())\n",
+    "median_test_score = math.floor(d['test_score(out of 10)'].median())\n",
     "median_test_score"
    ]
   },