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A car company says that the mean gas mileage for its luxury sedan is at least 23 miles per gallon (mpg). You believe the claim
A car company says that the mean gas mileage for its luxury sedan is at least
23
miles per gallon (mpg). You believe the claim is incorrect and find that a random sample of
8
cars has a mean gas mileage of
22
mpg and a standard deviation of
5
mpg. At
=0.10,
test the company's claim. Assume the population is normally distributed.
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