Chapter 13
HSD Test

I. Why we need post-hoc tests

II. Computation of the HSD (a.k.a. Tukey's Test).....(Worked problem)

 q = the Studentized Range Statistic from Table Q

 MSwg = Mean Square Within Groups

 n = The number of subjects in each group (or each row or each column)

 III. Any pair of means who's absolute difference is greater than the HSD is

significant.

Copyright © 1999, 2004 by Mark W. Vernoy