Test U Mann Whitney. So for example one might compare the speed at which two different groups of people can run 100 metres where one group has trained for six weeks and the other has not. In statistics the mann whitney u test is a nonparametric test of the null hypothesis that for randomly selected values x and y from two populations the probability of x being greater than y is equal to the probability of y being greater than x.
It is considered to be the nonparametric equivalent to the two sample independent t test. Some investigators interpret this test as comparing the medians between the two populations. So for example one might compare the speed at which two different groups of people can run 100 metres where one group has trained for six weeks and the other has not.
Some investigators interpret this test as comparing the medians between the two populations.
Other healthcare professional. Learn and reinforce your understanding of mann whitney u test. A mann whitney u test sometimes called the wilcoxon rank sum test is used to compare the differences between two independent samples when the sample distributions are not normally distributed and the sample sizes are small n 30. The mann whitney u test is a nonparametric test that allows two groups or conditions or treatments to be compared without making the assumption that values are normally distributed.
