diff --git a/module2/exo2/exercice_fr.html b/module2/exo2/exercice_fr.html
index 41252ceca2a8e6771a584cfea885bb0098917297..f7bd8a64d5e410f461df19090fc881dc26855d35 100644
--- a/module2/exo2/exercice_fr.html
+++ b/module2/exo2/exercice_fr.html
@@ -362,6 +362,9 @@ display: none;
 <pre class="r"><code>summary(values)</code></pre>
 <pre><code>##    Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
 ##    2.80   11.85   14.50   14.11   16.80   23.40</code></pre>
+<p>calcul de l’ecart type</p>
+<pre class="r"><code>sd(values)</code></pre>
+<pre><code>## [1] 4.334094</code></pre>