Mathematics, 30.10.2019 05:31, csarge2972

Weights of women in one age group are normally distributed with a standard deviation sigma of 20 lb. a researcher wishes to estimate the mean weight of all women in this age group. find how large a sample must be drawn in order to be 90% confident that the sample mean will not differ from the population mean by more than 3.5 lb.

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Weights of women in one age group are normally distributed with a standard deviation sigma of 20 lb....