# Mann-Whitney U Test

> Source: https://sukruyusufkaya.com/en/glossary/mann-whitney-u-testi
> Updated: 2026-05-13T20:58:49.195Z
> Type: glossary
> Category: matematik-istatistik-optimizasyon
**TLDR:** A test used to compare two independent groups without relying on strong parametric assumptions.

<p>The Mann-Whitney U test is a nonparametric test used to compare whether two independent groups differ in terms of central tendency or ranking behavior. It is a strong alternative when data is not normally distributed or when classical assumptions are violated. It is particularly useful with small datasets and rank-based comparisons. It does not always test mean differences directly; more generally, it examines systematic differences in the distributional structure. That makes it a reliable choice when parametric tests are not appropriate.</p>