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Childhood participation in sports cultural groups and youth groups appears to be related to improved...

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Childhood participation in sports cultural groups and youth groups appears to be related to improved 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 u 50 and a standard deviation of o 15 The sample of group participation adolescents had an average of M 53 8 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 a 05 Show all four steps part of the steps have already been given fill in the blanks or make your own changes 50 H Step 1 Ho u Step 2 a Step 3 Participation Participation p Z Step 4 Reject Accept the null hypothesis 50 b Compute Cohen s d to measure the size of the difference Is the effect size small medium or big according to the range mentioned in the lecture Cohen 1988 Show your work

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