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According to data from the National Environmental Education Foundation, on average, a United States resident uses 91 gallons of water per day in and around

According to data from the National Environmental Education Foundation, on average, a United States resident uses 91 gallons of water per day in and around his home.Assume the population standard deviation is known to be 27.3 gallons per day. A researcher randomly selected 16 US residents and found that they used on average 119 gallons per day in and around their home. Conduct a hypothesis test that uses a 0.05 significance level to test the claim that the mean amount of water used per day in and around a home is not 91 gallons.

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