Please let me know if there is a significant evidence to show that the populations are not equal. Thank you.
Mann-Whitney U Test:
Mann-Whitney U test is a non-parametric test used to check for differences between two sets of observations, usually based on samples taken from two separate populations.
In this procedure, the sample observations from the two populations are first combined and given a combined rank.
Suppose the number of observations in sample 1 is n1 and the number of observations in sample 2 is n2.
Let R1 be the sum of ranks of the sample 1 observations and R2 be the sum of ranks of the sample 2 observations.
Then, the Mann-Whitney U test statistic is the smaller of U1 and U2, defined as follows:
Sorry about that. What wasn’t helpful?