What outcome is likely to occur for a hypothesis test evaluating a treatment that has a very large and robust effect?
A)a Type I error
B)a Type II error
C)correctly rejecting the null hypothesis
D)correctly failing to reject the null hypothesis

Question

What outcome is likely to occur for a hypothesis test evaluating a treatment that has a very large and robust effect?
A)​a Type I error
B)​a Type II error
C)correctly rejecting the null hypothesis
D)​correctly failing to reject the null hypothesis

Quizplus · Accepted Answer

If a treatment has a very large and robust effect, it is likely that the hypothesis test will lead to correctly rejecting the null hypothesis. This is because the effect size is so large that it is unlikely to have occurred by chance, making the difference between the treatment and control groups significant. A Type II error is unlikely as well since the effect size is robust, meaning that even with a large sample size, the treatment's effect is still very noticeable. A Type I error is also unlikely since the effect size is significant and would be noticeable in the data. Thus, the best choice is C.

What Outcome Is Likely to Occur for a Hypothesis Test