Statistical Tests

Statistical Tests

Use the following information to ensure successful completion of the assignment:
• 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).

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

Answers to the case study questions are correct and thorough demonstrating deep understanding of the topic.

Thesis and/or main claim are comprehensive. The essence of the paper is contained within the thesis. Thesis statement makes the purpose of the paper clear.

Clear and convincing argument that presents a persuasive claim in a distinctive and compelling manner. All sources are authoritative.

• 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.

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