Mann-Whitney U
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
U de Mann-Whitney
About this calculator
The Mann-Whitney U calculator is a useful tool for statisticians and researchers who need to calculate the Mann-Whitney U statistic.
This calculator uses the formula U = n₁n₂ + n₁(n₁+1)/2 − R₁, where n₁ and n₂ are the number of observations in the two groups, and R₁ is the sum of the positions of the observations in the first group.
The Mann-Whitney U is a non-parametric test that compares the distributions of two independent samples. It is a useful option when the variables do not follow a normal distribution.
Remember to consider the precautions when using this calculator, such as ensuring that the samples are independent and that the variables are measurable.
Frequently asked questions
What is the Mann-Whitney U?
The Mann-Whitney U is a non-parametric statistic that compares the distributions of two independent samples.
When to use the Mann-Whitney U?
Use the Mann-Whitney U when the variables do not follow a normal distribution and you need to compare the distributions of two independent samples.
How does the Mann-Whitney U calculator work?
The calculator uses the formula U = n₁n₂ + n₁(n₁+1)/2 − R₁ to calculate the Mann-Whitney U statistic.
What are the precautions when using the Mann-Whitney U calculator?
Ensure that the samples are independent and that the variables are measurable when using the Mann-Whitney U calculator.