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Mathematics, 15.04.2020 17:24 hwest98
The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day. Assume that the population standard deviation is 1.3 gallons. The mean water usage per family was found to be 15 gallons per day for a sample of 499 families. Construct the 99% confidence interval for the mean usage of water. Round your answers to one decimal place.
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