Mathematics, 10.08.2021 02:50 22katelynfrankouqqrb

The group of 25 victims scored an average of 25.3 with a sample standard deviation of 9 on the anxiety scale. The group of 23 bystanders scored an average of 20.5 with a sample standard deviation of 8 on the same scale. You do not have any presupposed assumptions about whether victims or bystanders will be more anxious, so you formulate the null and alternative hypotheses as:

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