Childhood participation in sports, cultural groups, and youth groups appears to

Question

Childhood participation in sports, cultural groups, and youth groups appears to be related to imporved self-esteem for adolescents (McGee, Williams, Howden-Chapman, Martin & Kawachi, 2006). In a representative study, a sample of n - 100 adolescents with a history of group participation is given a standardized self-esteem questionnaire. For the general population of adolescents. scores on this questionnaire form a normal distribution with a mean of 40 and a standard deviation of 12. The sample of group-participation adolescents had an average of M = 43.84. a. Does this sample provide enough evidence to conclude that self-esteem scores for these adolescents are significantly different from those of the general population? Use a two-tailed test with alpha of .01. b. Compute Cohen's d to measure the size of the difference. c. Write a sentence describing the outcome of the hypothesis test and the measure of effect size as it would appear in a research report.

Explanation / Answer

07. Childhood participation in sports, cultural groups, and youth groups appears to be related to improved self-esteem adolescents. In a representative study, a sample of n = 100 adolescents with a history of group participation is given a standardized self-esteem questionnaire. For the general population of adolescents, scores on this questionnaire forma a normal distribution with a mean of u = 40 and a standard deviation of o = 12. The sample of group participation adolescents has an average of M = 43.84 Use a two-tailed test with x = .01. a. Does this sample provide enough evidence to conclude that self-esteem scores for these adolescents are significantly different from those of the general population? Use a two-tailed test with x =.01 b. Compute Cohen

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