Two tailed or one tailed t-test?

  • Thread starter Thread starter Leigh N
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Leigh N

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Problem Baguio car rental agency claims that the average mileages of cars rented is less than 9000 miles. a sample of eight cars has an average mileage of 8882 miles with a standard deviation of 500. at alpha 0.01, is there enough evidence to reject the agency's a claim?

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