Six Sigma and Beyond: Statistics and Probability, Volume III

SCHEFFE'S TEST

The Scheffe's test is in effect an F test. However, this F test is computed as a separate test for every comparison using the following formula.

After this F is computed, you compare it to the table value you found when you did your analysis of variance. If the F is equal to or greater than the table value, it is considered significant. The MS _W is the mean square within from the ANOVA table.