Mann Whitney U Testi Spss. The reason you would perform a mann whitney u test over an independent t test is when the data is not normally distributed. The result will appear in the spss data viewer.
How to perform a mann whitney u test in spss a mann whitney u test sometimes called the wilcoxon rank sum test is used to compare the differences between two samples when the sample distributions are not normally distributed and the sample sizes are small n 30. The reason you would perform a mann whitney u test over an independent t test is when the data is not normally distributed. Assumptions of the mann whitney u 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 this is what happens when your data has violated assumption 4 of the mann whitney u test.
The mann whitney u test is often considered the nonparametric alternative to the independent t test although this is not always the case. The reason you would perform a mann whitney u test over an independent t test is when the data is not normally distributed. Spss statistics output and interpretation. 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 this is what happens when your data has violated assumption 4 of the mann whitney u test.
