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 ...

The core use of this statistic is for direct comparison between two samples to check their differences. The t-statistic is a calculation performed during a t-test to determine if you should rejec ...

In comparing two treatments with the event time observations, the hazard ratio (HR) estimate is routinely used to quantify the treatment difference. However, this model dependent estimate may be ...