2. What are the assumptions of a correlated-groups t test?
4.What measure of effect size is used for a correlated-groups t test?
6. The student in Question 5 from Module 18 decides to conduct the same study using a within-subjects design in order to control for differences in cognitive ability. He selects a random sample of participants and has them study different material of equal difficulty in both the music and no music conditions. The data appear below. As before, they are measured on an intervalratio scale and are normally distributed.
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