Mathematics, 17.04.2020 00:48 CameronVand21

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 2.22.2 gallons. The mean water usage per family was found to be 15.815.8 gallons per day for a sample of 669669 families. Construct the 90%90% confidence interval for the mean usage of water. Round your answers to one decimal place.

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The water works commission needs to know the mean household usage of water by the residents of a sma...