In doing the oneway ANOVA F test we should always do a posth

In doing the one-way ANOVA F test we should always do a post-hoc analysis (such as Tukey paired comparisons).

True/False

Solution

True

ANOVA test tells you whether you have an overall difference between your groups, but it does not tell you which specific groups differed - post hoc tests do. Because post hoc tests are run to confirm where the differences occurred between groups, they should only be run when you have a shown an overall significant difference in group means (i.e., a significant one-way ANOVA result). Post-hoc tests attempt to control the experimentwise error rate (usually alpha = 0.05) in the same manner that the one-way ANOVA is used, instead of multiple t-tests. Post-hoc tests are termed a posteriori tests; that is, performed after the event (the event in this case being a study)