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A researcher is evaluating whether a new intervention affects the average reported anxiety symptoms in a...

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Statistics

A researcher is evaluating whether a new intervention affectsthe average reported anxiety symptoms in a sample of 49 collegestudents. A survey from the previous semester found that thepopulation reported a mean anxiety score of 22 with a standarddeviation of 7. The sample completes the same measure of anxiety,with an average score of 20. The researcher sets their alpha levelat .05 and performs a two-tailed test to determine whether anxietyincreases or decreases after the intervention. Calculate effectsize using Cohen’s d. Show all of your calculations for fullcredit.

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Solution Given thatPopulation mean Population standard deviation Sample mean To test whether    See Answer
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