In another study of the effect of violent, sexuall sion, the same researchers use a within-subject design rather than independent groups (as in Exercise 7). They test the aggressiveness of 9 volunteers, expose them to a violent, sexually explicit film, and then retest their aggressiveness. aaressiveness?

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8. In another study of the effect of violent, sexually explicit material on aggres-
sion, the same researchers use a within-subject design rather than independent
groups (as in Exercise 7). They test the aggressiveness of 9 volunteers, expose
them to a violent, sexually explicit film, and then retest their aggressiveness.
The data are shown here. Did viewing the film increase aggressiveness?
Transcribed Image Text:8. In another study of the effect of violent, sexually explicit material on aggres- sion, the same researchers use a within-subject design rather than independent groups (as in Exercise 7). They test the aggressiveness of 9 volunteers, expose them to a violent, sexually explicit film, and then retest their aggressiveness. The data are shown here. Did viewing the film increase aggressiveness?
Pretest
Posttest
Subject #
4
6.
1
2
8
3
7
5
4
9.
11
6
10
4
7
7
2
7
8
3
4
9.
5
Notice that the scores for Exercise 7 are identical to the scores in this exercise.
Compare the t values and conclusions you would draw in each case.
Transcribed Image Text:Pretest Posttest Subject # 4 6. 1 2 8 3 7 5 4 9. 11 6 10 4 7 7 2 7 8 3 4 9. 5 Notice that the scores for Exercise 7 are identical to the scores in this exercise. Compare the t values and conclusions you would draw in each case.
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