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 independentgroups (as in Exercise 7). They test the aggressiveness of 9 volunteers, exposethem to a violent, sexually explicit film, and then retest their aggressiveness.The data are shown here. Did viewing the film increase aggressiveness? PretestPosttestSubject #46.12837549.11610477278349.5Notice 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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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?