"Do you know now, before any data are gathered, what pairwise comparisons you want to make? If the answer is yes, and the number is few, we go in one direction; if the answer is no, or `all of them', then we go in another direction."This is a discussion about
A) independent or related samples designs
B) assumptions of ANOVA
C) the null hypothesis and the alternate hypothesis
D) a priori and post hoc tests.

Question

Quizplus · Accepted Answer

The statement discusses the planning of comparisons before or after data collection, which directly relates to a priori (planned) and post hoc (after the fact) tests in statistical analysis. A priori tests are planned before data are collected based on specific hypotheses, while post hoc tests are conducted after analyzing the data to explore all possible comparisons.

"Do You Know Now, Before Any Data Are Gathered, What