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Estimate for the mean birth weight

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A scientist studying babies born prematurely would like to obtain an estimate for the mean birth weight, U(mean) , of babies born during the 24th week of the gestation period. She plans to select a random sample of birth weights of such babies and use the mean of the sample to estimate U (mean) . Assuming that the population of birth weights of babies born during the 24th week has a standard deviation of 2.5 pounds, what is the minimum sample size needed for the scientist to be 95% confident that her estimate is within .5 pounds of U (mean)?

Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements).

Reference no: EM131152951

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