One Sample T Hypothesis Test (Student’s T Test) are used to resolve hypothesis tests around comparing process means ( sample size to be <30)
The F-distribution, also known Fisher-Snedecor distribution, is used to test for equality of variances from two normal populations.
A Chi-Square goodness of fit test tells how well a categorical (nominal or ordinal) sample distribution fit into a hypothetical distribution.
The chi square (χ2) distribution is the best method to test a population variance against a known or assumed value of the population variance
In the Analyze phase of DMAIC, we want to use the 6M’s in Six Sigma (Six Ms or 5Ms and one P or 5M1P). This helps root out defects.