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(A) In a sample of 12 men the quantity of hemoglobin in the blood stream had a mean of 15 g/dl and a standard deviation
(A) In a sample of 12 men the quantity of hemoglobin in the blood stream had a mean of 15 g/dl and a standard deviation of 3 g/dl. Find the 99% confidence interval for the population mean blood hemoglobin. (Round your final answers to the nearest hundredth)
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