diff --git a/contrib/numpy/index.md b/contrib/numpy/index.md
index 50e8046..3abfb27 100644
--- a/contrib/numpy/index.md
+++ b/contrib/numpy/index.md
@@ -11,3 +11,4 @@
 - [Sorting NumPy Arrays](sorting-array.md)
 - [NumPy Array Iteration](array-iteration.md)
 - [Concatenation of Arrays](concatenation-of-arrays.md)
+- [Statistical Operations on Arrays](statistical-operations-on-arrays)