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17. For random samples of size n = 25 selected from a nor-mal distribution with a mean of mean of = 50 and a standard

17. For random samples of size n = 25 selected from a nor-mal distribution with a mean of mean of = 50 and a standard deviation of = 20, find each of the following: a. The range of sample means that defines the middle 95% of the distribution of sample means. b. The range of sample means that defines the middle 99% of the distribution of sample means.

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