Mann-Whitney Test

A nonparametric statistical tool that compares the median of a continuous (a.k.a. variable or numerical) value between two factors. This test is designed for comparing only one value to another and differs from the Kruskal-Wallis test and Mood's Median test that can support comparing more than two factors at a time.
Related StatStuff Video: 
   -Section 6-Analyze Phase, Lesson #21 - Hypothesis Testing: Central Tend. - Non-Normal (Compare 1:1)