Essay
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 α = .01.
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0.0075;reject the null hypothesis.
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