Decide whether you should use a normal sampling distribution or a sampling distribution to perform?
Perform the hypothesis test. Justify your decision, then use the distribution to test the claim. Write a short paragraph about the results of the test and what you conclude about the claim.
Gas Mileage - 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 five cars has a mean gas mileage of 19 mpg and a standard deviation of 4 mpg. Assume the gas mileage of all of the company's luxury sedans is normally distributed At x = 0.05 test the company's claim.