diff --git a/module2/exo2/exercice_fr.Rmd b/module2/exo2/exercice_fr.Rmd
index 56fdc838d8fa67dcab701564ab22469d035590da..1bc9062f195c608a9c6c956a404cc5587403be42 100644
--- a/module2/exo2/exercice_fr.Rmd
+++ b/module2/exo2/exercice_fr.Rmd
@@ -21,4 +21,5 @@ Calculs:
 
 ```{r , echo=TRUE}
 summary(data)
+sd(data)
 ```