diff --git a/module2/exo2/exercice_fr.Rmd b/module2/exo2/exercice_fr.Rmd
index 286997a83769bec7d7fb2112d62e5e2bc1077f23..42c098636bfd7364f850f8efe421b121b0c8540f 100644
--- a/module2/exo2/exercice_fr.Rmd
+++ b/module2/exo2/exercice_fr.Rmd
@@ -17,5 +17,6 @@ Data
 ```
 ```{r}
 summary(Data)
+sd(Data)
 ```