question archive A simple random sample from a population with a normal distribution of 100 body temperatures has x bar=98

A simple random sample from a population with a normal distribution of 100 body temperatures has x bar=98

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A simple random sample from a population with a normal distribution of 100 body temperatures has x bar=98.50 F° and s=0.64 F°. 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 2.10 F°?

       F° < σ <        F° 

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