Question: please help this is statistics homework and I'm not sure how to calculate the answer for this chapter homework problem.................................................................. Question 7 ,1 A city

please help this is statistics homework and I'm not sure how to calculate the answer for this chapter homework problem..................................................................

Question 7 ",1 A city planner wants to estimate, with a 99% condence level, the average monthly residential water usage in the city. Based on earlier data, the population standard deviation of the monthly residential water usage in this city is 387.90 gallons. How large a sample should be selected so that the estimate for the average monthly residential water usage in this city is within 90 gallons of the population mean? Round your answers to the nearest integer. n = .. m_, Hint eTextbook and Media

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