diff --git a/README.md b/README.md
index c37d3bc..dc30290 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # Mapytex
 
-Formal calculus with explanation python module.
+Formal calculus with explanation python module and exercises creation tools.
 
 [French wiki](https://opytex.org/pymath)
 
@@ -56,3 +56,38 @@ pip install -U mapytex
 \frac{ 6 + 10 }{ 15 }
 \frac{ 16 }{ 15 }
 ```
+
+### Statistical tools
+
+``` python
+>>> from mapytex import Dataset
+>>> d = Dataset.random(10, "Poids des sacs (kg)", "gauss", (4, 1), v_min=1)
+>>> print(d)
+[3.03, 5.94, 4.46, 2.58, 5.32, 3.22, 5.75, 4.22, 1.81, 4.71]
+>>> d.mean()
+4.1
+>>> d.effectif_total()
+10
+>>> d.sum()
+41.04
+>>> print(d.tabular_latex(2))
+\begin{tabular}{|c|*{5}{c|}}
+    \hline
+    3.03 & 5.94 & 4.46 & 2.58 & 5.32 \\
+    \hline
+    3.22 & 5.75 & 4.22 & 1.81 & 4.71 \\
+    \hline
+\end{tabular}
+
+>>> w = WeightedDataset([1, 2, 3, 4], "Enfants", [10, 11, 12, 13])
+>>> print(w)
+{1: 10, 2: 11, 3: 12, 4: 13}
+>>> print(w.tabular_latex())
+\begin{tabular}{|c|*{4}{c|}}
+\hline
+    Enfants & 1 & 2 & 3 & 4 \\
+    \hline
+    Effectifs & 10 & 11 & 12 & 13 \\
+    \hline
+\end{tabular}
+```