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Let's assume that, over the years, a paper and pencil test of anxiety yields a mean...

Let's assume that, over the years, a paper and pencil test of anxiety yields a mean score of 35 for all incoming freshmen. We wish to determine whether the score of a random sample of 20 new freshmen, with a mean of 30 and a standard deviation of 10, can be viewed as coming from this population. Test at the .05 level of significance.

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