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Find the necessary sample size Weights of women in one age group are normally distributed...

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Find the necessary sample size Weights of women in one age group are normally distributed with a standard deviation o a 17 lb A researcher wishes to estimate the mean weight of all women in this age group Fin how large a sample must be drawn in order to be 90 percent confident that the sample mean will not differ from the population mean by more than 2 0 lb O 208 O 278 O 194 O 196

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