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A nurse at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she desires

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A nurse at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she desires to be 90% confident that the true mean is within 2 ounces of the sample mean? The population standard deviation of the birth weights is known to be 8 ounces. O A. 7 OB. 44 O C. 43 OD. 6

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