The two-sample t-test is one of the most commonly used hypothesis tests in Six Sigma work. It is applied to compare the average difference between two groups. You use it to determine if the difference ...

This article considers the problem of comparing two independent groups in terms of some measure of location. It is well known that with Student's two-independent-sample t test, the actual level of ...

The Wilcoxon Rank Sum Test is a non-parametric means of comparing data between two sets. It operates as a useful alternative ...