Match each choice on the left with the impact it would have on power listed on t

Question

Match each choice on the left with the impact it would have on power listed on the right. With n 20 participants, choosing to conduct a repeated-measures design instead of a between-subjects design. Increase power When conducting a matched-subjects design, choosing to use n 10 participants instead of n 30 participants. Increase power When using a related-samples t test and Decrease power choosing alpha .001 instead of alpha 05 When conducting a between-subjects design and recruiting a highly diverse (i.e. heterogeneous) sample instead of a homogeneous sample Decrease power

Explanation / Answer

1. Correct, repeated measures design are more powerful that between subject designs

2. Looks wrong. It should decrease power. As sample size decreases, power of a test decreases

3.Correct. As significance level decreases power decreases

4. Correct. Homogeneous samples are generally more powerful

If any doubt occurs, comment.

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