Posted by **kim** on Saturday, June 29, 2013 at 7:38pm.

The student in Question 5 from Module 18

decides to conduct the same study using a

within-participants 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.

Music No Music

6 10

7 7

6 8

5 7

6 7

8 9

8 8

a. What statistical test should be used to

analyze these data?

b. Identify H0 and Ha for this study.

c. Conduct the appropriate analysis.

d. Should H0 be rejected? What should the

researcher conclude?

e. If significant, compute the effect size and

interpret.

f. If significant, draw a graph representing

the data.

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