Which of the following statements is true regarding post-hoc tests and planned contrasts?
A) Both statistical tests are planned ahead of time.
B) Post-hoc statistical tests examine all of the possible combinations of conditions in a way that statistically accounts for the fact that not all of them were predicted ahead of time.
C) Neither statistical test compares between groups.
D) Post-hoc tests combine two conditions so you can compare them with a third.

Question

Quizplus · Accepted Answer

Post-hoc tests are designed to explore differences between groups after an ANOVA shows significant differences, without specific hypotheses in mind before the analysis. They account for multiple comparisons to control for the increased risk of Type I error. Planned contrasts, in contrast, are specific comparisons between groups or conditions hypothesized before the study is conducted.

Which of the Following Statements Is True Regarding Post-Hoc Tests