Wilcoxon rank-sum test

The Wilcoxon rank-sum test is a statistical method used to compare two groups to see if their differences are significant. Instead of comparing raw data directly, it ranks all data points from both groups together. Then, it checks whether the ranks from one group tend to be higher or lower than those from the other group. This helps determine if there’s a real difference between the groups or if any observed difference is likely due to chance. It’s useful when data aren’t normally distributed or when dealing with small sample sizes.