You have conducted an ANOVA test using several different groups and H₀ was rejected. How can you best determine which groups differed significantly?
A) Conduct t tests for two groups at a time.
B) Use Tukey's HSD.
C) Use eta squared.
D) Use chi-square.

Question

Quizplus · Accepted Answer

Tukey's HSD (Honestly Significant Difference) test is a post-hoc test that can be used to determine which specific groups significantly differ from each other after rejecting the null hypothesis in an ANOVA test. This test compared all possible pairs of means and uses a family-wise error rate to adjust for the number of comparisons made. Option A is not the best choice as conducting multiple t-tests can increase the risk of a type I error. Option C (eta squared) is a measure of effect size and does not provide information on which groups significantly differ. Option D (chi-square) is not applicable for comparing means between groups.

You Have Conducted an ANOVA Test Using Several Different Groups