Mann-Whitney U test

The Mann-Whitney U test is a statistical method used to compare two groups to see if their values differ significantly. Unlike traditional tests that assume data follows a normal distribution, this test works with ranks instead of raw data values, making it useful for non-normally distributed data or ordinal data. For example, it can be used to compare test scores of two different classes. The test effectively assesses whether one group tends to have higher values than the other, helping researchers understand differences without relying on strict assumptions about the data's distribution.