Two Tailed Mann Whitney U Test Table. See mann whitney test for details. U 2 n 1 n 2 0 5n 2 n 2 1 r 2.
Compute the test statistic u. The mann whitney u test is a non parametric test that can be used in place of an unpaired t test. Where r 1 sum of the ranks for group 1 and r 2 sum of the ranks for group 2.
The test statistic for the mann whitney u test is denoted u and is the smaller of u 1 and u 2 defined below.
Table b io cont o. N2 number of elements in the smallest sample. 0 25 53 62 71 75 80 89 102 106 111 115 119 128 132 137 1141 150 154 159 163 167 172 176 181 51 56 61 66 71 76 86 91 96. In statistics the mann whitney u test also called the mann whitney wilcoxon mww wilcoxon rank sum test or wilcoxon mann whitney 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.
