Correctly spell "implementation"
diff --git a/src/distributions/weighted_index.rs b/src/distributions/weighted_index.rs
index 13334cd..e21439c 100644
--- a/src/distributions/weighted_index.rs
+++ b/src/distributions/weighted_index.rs
@@ -48,7 +48,7 @@
/// Sampling from `WeightedIndex` will result in a single call to
/// `Uniform<X>::sample` (method of the [`Distribution`] trait), which typically
/// will request a single value from the underlying [`RngCore`], though the
-/// exact number depends on the implementaiton of `Uniform<X>::sample`.
+/// exact number depends on the implementation of `Uniform<X>::sample`.
///
/// # Example
///
