Two Tailed Mann Whitney U Test Table. Table critical values of the smallest rank sum for the wilcoxon mann whitney test n1 number of elements in the largest sample. For this example in our example u 3.
U 2 n 1 n 2 0 5n 2 n 2 1 r 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. 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.
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.
N2 number of elements in the smallest sample. Alpha 001 two tailed alpha 005 two tailed alpha 01 two tailed. Where u 1 u 2 n 1 n 2. Is this evidence in support of the null or research hypothesis.
