Mann Whitney U Test Interpretation. Interpretation minitab uses the mann whitney statistic to calculate the p value which is a probability that measures the evidence against the null hypothesis. Because the interpretation of the mann whitney statistic depends on the sample size use the p value to make a decision about the test.
If you have been following this guide from page one you will know that the following output and interpretation relates to the mann whitney u test results when your two distributions have a different shape such that you are comparing mean ranks rather than medians. The u test is a member of the bigger group of dependence tests. Complete the following steps to interpret a mann whitney test.
Some investigators interpret this test as comparing the medians between the two populations.
There was a statistically significant difference in working time between both groups u 1535995 00 z 12 763 p 001. The p value has the same meaning for any sample size. The mann whitney u test sometimes called the mann whitney wilcoxon test or the wilcoxon rank sum test is used to test whether two samples are likely to derive from the same population i e that the two populations have the same shape. To perform the mann whitney test prism first ranks all the values from low to high paying no attention to which group each value belongs.
