Why Is a Post-Hoc Test Necessary If You've Used a One-Way

question 6

Multiple Choice

Why is a post-hoc test necessary if you've used a one-way ANOVA to avoid the problem of multiple comparisons?

• A) Accounting for their respective standard deviations increased the alpha level.
• B) In the case of a significant F value, you were unsure of how the three groups differed.
• C) It was necessary to set a new error rate for each individual t-test.
• D) All these are correct.

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