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A research team wants to investigate the usefulness of relaxation training for reducing levels of anxiety in individuals experiencing stress. They identify 34 people at

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A research team wants to investigate the usefulness of relaxation training for reducing levels of anxiety in individuals experiencing stress. They identify 34 people at random from a group of 100 who have “high stress” jobs. The 34 people are randomly divided into two groups. One group acts as the control group and receive no training. The second group of 17 receive the relaxation training. The subjects in each group are then given an anxiety inventory. The summarized results appear below where higher scores indicate greater anxiety. Control Group: n = 17, mean = 31, standard deviation = 6.63 Relaxation Group: n = 17, mean = 26, standard deviation = 6.20 A: What type of test should you conduct? One-sample t test, Independent 2-sample t test, Paired sample t test? B. Should you reject or retain the null hypothesis using an alpha level of 0.05 (two tailed test)? C: Construct a 68% confidence interval around the anticipated difference. D: Calculate a Cohen’s d effect size value.

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