Mathematics, 06.05.2020 05:31 natalia1978
A car company says that the mean gas mileage for its luxury sedan is at least 21 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 19 mpg and a standard deviation of 3 mpg. At α=0.025, test the company's claim. Assume the population is normally distributed. State the appropriate hypotheses to test.
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