We consider Mary's interest in doing a study to see if learning of 6th graders on a math lesson is affected by background noise level. There, she was planning to use 2 noise conditions and then analyze her outcomes using a t-test for independent groups. Now consider Mary's study of whether the learning of 6th graders on a math lesson is affected by background noise level.

1. Describe the pros and cons of Mary using a repeated measures design for this study.
2. What would you probably choose to do? Support your responses.