5 points A psychologist is examining the influence of an old

(5 points) A psychologist is examining the influence of an older sibling in the development of aggressi sample of 24 adults is obtained. Half of these people had no siblings and the others had at least one younge sibling who is within s years his or her age. The psychologist records a aggression level for each participant a obtained the following data: Do these data indicate that having a sibling has a significant effect on the development of aggression? Use atwo-tailed test atthe.05 level. No sibling older sibling n 12 n 12 Ma 17 M 24 SS 580 SS 608

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