A student is interested in whether students who study with music playing devote as much attention to their studies as do students who study under quiet conditions. He randomly assigns participants to either the music or no-music condition and has them read and study the same passage if information for the same amount of time. Subjects are given the same 10-item test on the material. Their scores appear next. Scores on the test represent interval-ratio data and are normally distributed.

Music No Music

6 10

5 9

6 7

5 7

6 6

6 6

7 8

8 6

5 9

c. Conduct the appropriate analysis.

d. Should Ho be rejected? What should the researcher conclude?

e. Determine the 95% confidence interval.

f. If significant, compute and interpret the effective size.