If J = 4, which of the following statements is true? A) You should always do a priori comparisons before an ANOVA. B) You should always do post hoc tests after an ANOVA. C) You should always do post hoc tests to determine why H₀ was rejected. D) You should always do post hoc tests to determine why H₀ was not rejected.

Question

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Post hoc tests are used to determine which specific groups are different from each other after an ANOVA has rejected the null hypothesis.

If J = 4, Which of the Following Statements Is