Question: A simple random sample from a population with a normal distribution of 103 body temperatures has x=98.70F and s=0.65F. Construct an 80% confidence interval estimate

A simple random sample from a population with a normal distribution of 103 body temperatures has x=98.70F and s=0.65F. Construct an 80% confidence interval estimate of the standard deviation of body temperature of all healthy humans. Is it safe to conclude that the population standard deviation is less than 1.70F?

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