Mathematics, 06.09.2021 22:00, bluetigerbird5323

a survey planned to determine the mean annual family expenses of employees of a large company. company wishes to be 95% confident that the sample is correct to within += $50 of the population mean annual family expenses. previous study indicates that the standard deviation is $400.How large of a sample is necessaryif management wants to correct thin +- $25, how employees need to be selected.

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a survey planned to determine the mean annual family expenses of employees of a large company. compa...