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Question
It is estimated that the average person in the United States uses 123 gallons of water per day. Some environmentalists believe this figure is too high and conduct a survey of 40 randomly selected Americans. They find a mean of 113.03 gallons and a population standard deviation of 25.99 gallons. Calculate the p-value for this test statistic, and test the hypothesis at 
= .01 using the p-value rule.
Answer
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