A city planner wants to estimate, with a 95% confidence 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 387.40 gallons. How large a sample should be selected so that the estimate for the average monthly residential water usage in this city is within 100 gallons of the population mean? Round your answers to the nearest integer. n = i

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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A city planner wants to estimate, with a 95% confidence 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 387.40 gallons. How large a sample
should be selected so that the estimate for the average monthly residential water usage in this city is within 100 gallons of the
population mean?
Round your answers to the nearest integer.
n =
i
Transcribed Image Text:A city planner wants to estimate, with a 95% confidence 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 387.40 gallons. How large a sample should be selected so that the estimate for the average monthly residential water usage in this city is within 100 gallons of the population mean? Round your answers to the nearest integer. n = i
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