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an auto maker estimates that the mean gas mileage of its luxury is at least 25 miles per gallon.

an auto maker estimates that the mean gas mileage of its luxury is at least 25 miles per gallon.a random sample of eight such cars had a mean 23 miles per gallon and the standard deviation of 5 miles per gallon.at level of significance 0.05
MATH 131.mht

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