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October 22, 2014

Homework Help: statistics

Posted by George on Wednesday, May 5, 2010 at 6:53pm.

An auto maker estimates that the mean gas mileage of its sport utility vehicle is 20 miles per gallon. A random sample of 8 such vehicles had a mean of 18 per gallon and a standard deviation of 5 miles per gallon. At Š=0.05, can you reject the auto makerís claim that the mean gas mileage of its sports
utility vehicle is 20 miles per gallon? Assume the population is normally distributed.

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