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Assume that the population standard deviation is 1.4 gallons. The mean water usage per family was found to be 18.5 gallons per day for a
Assume that the population standard deviation is 1.4 gallons. The mean water usage per family was found to be 18.5 gallons per day for a sample of 543 families. Construct the 98% confidence interval for the mean usage of water. Round to one decimal place
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