Definition of Mann-Whitney Test:
Designating or relating to a method of testing whether the difference between independent observations from two populations has zero median, and hence whether the populations are in fact the same. Chiefly in Mann–Whitney (U) test.
A non-parametric test that compares the mean values of two samples. The Mann-Whitney test can be used to evaluate two different data populations, such as performance results from two separate production lines, or customer survey responses taken before and after a process improvement has been implemented.
Meaning of Mann-Whitney Test & Mann-Whitney Test Definition