Question: Statistics are age group we normaly distributed w/ standard deviation of $90. Fand the sample size needed to assure w/ 95% contidance that the mean

Statistics

are age group we normaly distributed w/ standard deviation of $90. Fand the sample size needed to assure w/ 95% contidance that the mean will not differ from population mean by more than $10. 20 C) 312 5 311 1

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