You obtained a significant test statistic when comparing three treatments in a one-way ANOVA. In words, how would you interpret the alternative hypothesis HA?

Question

[A] At least two treatments are different from each other in terms of their effect on the mean response

[B] Exactly two of the three treatments have the same effect on the mean response

[C] All three treatments have different effects on the mean response

[D] None of the above

Answer & Explanation
Answer: At least two treatments are different from each other in terms of their effect on the mean response