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An investigator polls common cold sufferers, asking them to estimate the number of hours of physical

discomfort caused by their most recent colds. Assume that their estimates approximate a normal curve with a mean of 83 hours and a standard deviation of 20 hours. What is the estimated number of hours suffered by the extreme 1 percent either above or below the mean?

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x Centered 2 % = 8... View the full answer

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