Wilcoxon-Mann-Whitney Rank Sum Test Much like the t and F Test, the Wilcoxon – Mann – Whitney Rank Sum Test looks for statistical differences between two groups of data. However, it allows you to evaluate data that not normally distributed. If you are comparing non-normal data, such as Flatness, you can use this spreadsheet. If you are certain that your data is normally distributed you should consider using a t and F test. |