A car company says that the mean gas mileage for

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23.A car company says that the mean gas mileage for its luxury sedan is at least 25miles per gallon (mpg). You believe the claim is incorrect and find that a random sample of 6 cars has a mean gas mileage of 22mpg and a standard deviation of 3 mpg. At α=0.05, test the company's claim. Assume the population is normally distributed.

Click here to view the t-distribution table.

Click here to view page 1 of the normal table.

Click here to view page 2 of the normal table.

Which sampling distribution should be used and why?