When should post hoc comparisons be performedSolutionJust as

When should post hoc comparisons be performed?

Solution

Just as the Student t test, ANOVA is a parametric test and as such requires a number of assumptions to be applied correctly. Called ANOVA or analysis of variance, we actually will serve not only to study the dispersion or variance of the groups, but to study its means and the ability to create subsets of groups with equal means. One can say that ANOVA is the generalization of Student\'s t, because if we make a ANOVA test comparing only two groups, we get the same results.