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 ...

A t-statistic is performed during a t-test. The resulting statistic is used to determine whether to accept or reject a null ...

A cardiologist offers the first proof that his little-used test for heart attacks not only could save lives but billions of dollars.