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A simple random sample of 100 adults is obtained, and each person’s red blood cell count...

A simple random sample of 100 adults is obtained, and each person’s red blood cell count (in cells per microliter) is measured. The sample mean is 4.63 and the standard deviation for red blood cell counts is 0.54. Construct a 90% confidence interval estimate of the mean red blood cell count of adults.

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