It reduces Type I error at the expense of Power. It is appropriate to use this test when one desires all the possible comparisons between a large set of means (6 or more means).
Post Hoc tests that assume equal variance
Dunnett
将一组处理与单个控制平均值进行比较的成对多重比较 T 检验。您可以选择第一个类别或最后一个类别作为默认控制类别。