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Use the following information to ensure successful completion of the assignment: APA Required and No Plagarism


•Researchers wanted to explore self esteem in adolescent boys and adolescent girls. Each respondent completed a 10 item self esteem scale (they chose one rating for each item from a Likert type scale, 1 = strongly disagree and 5 = strongly agree). The sum of the 10 ratings was each respondent’s self esteem score.  Their results were: t = 2.01, d = .90 (40 girls, 40 boys).



Required to use APA style for their writing assignments.


This assignment requires that at least two additional scholarly research sources related to this topic, and at least one in text citation from each source be included.



In an essay of 250 500 words, use the scenario presented in part 1a, above, to thoroughly answer the following questions:


1.       What statistical test did the researchers use to determine if there was a statistically significant

        difference in levels of self esteem between the boys and the girls?


2.       What was the purpose of calculating a Cohen’s d? When is a Cohen’s d calculated? Interpret d=.90.

        What does it mean in this example? 



3.       What if the researcher compared the adolescent boys before treatment and again after treating them

        for depression? What type of t test would be most appropriate in this case, and why

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