March 30, 2017

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17. The Student Health Service assumes, based on historical data, that the height of female students is normally distributed with a standard deviation of 3 inches. The school nurse wants to estimate the average height of this year’s entering female students by examining the records of a random group of 100 of these female students. With what probability can the nurse be sure that the error around the estimated mean is within at most one half inch?

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