Would appear in a research report.M-Cohen's d=c. According to a single-sample z-test,p< __, d=has aeffectonz =SUS Childhood participation in sports, cultural groups,and youth groups appears to be related to improvedself-esteem for adolescents (McGee, Williams,Howden-Chapman, Martin, & Kawachi, 2006). In arepresentative study, a sample of n = 100 adolescentswith a history of group participation is given a stan-dardized self-esteem questionnaire. For the generalpopulation of adolescents, scores on this questionnaireform a normal distribution with a mean of p%3D50 and%3D15. The sample of group-a standard deviation of o%3Dparticipation adolescents had an average of M = 53.8.

Given, Population mean =50 Population standard deviation = 15 Sample mean = 53.8 Sample size =100 Null Hypothesis: H0:µ=50 The mean Self-esteem scores for theses adolescents is equal to 50. Alternative hypothesis: H1:µ≠50 The mean Self-esteem scores for theses adolescents is not equal to 50. Level of significance is 0.05. Cohens d: Cohen’s d=M-µ/σx =53.8-50/15 =0.2533 Thus, effect size is 0.2533.Test statistic using T1-83: Press STAT>TESTS>Z-Test. Enter µ0 = 50, x-bar as 53.8, σ as 15, n as 100. Alternative: as “≠µ0”. Select Calculate and press “Enter”. Z value is 2.533 p-value is less than 0.05. Conclusion: Since, the p-value is less than 0.05, reject H0. Therefore, the decision is “reject H0”. Yes, there is enough evidence to conclude that the mean self-esteem scores for the adolescents are significantly different from those of the general population. c) According to a single sample z test, sample adolescents has a different small effect on general population. z=2.533, p<0.05, d= 0.2533.

Answered: M- Cohen's d= has a effect . According…

Math

Statistics

M- Cohen's d= has a effect . According to a single-sample z-test, on Z =

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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