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In 2004, a small dealership leased 21 Chevrolet Impalas on 2 year lease. When the cars were returned in 2006, the mileage was ecorded.

In 2004, a small dealership leased 21 Chevrolet Impalas on 2 year lease. When the cars were returned in 2006, the mileage was ecorded. The manufaturer wants toknow if the dealer's mean mileage for the cars is significantly greater tha the national average of 30,000 miles for 2 year leased vehicles, using a 10 percent level of significance. Write a mathematical expressions or the null hypothesis and alternative hypothesis that you would use in a hypothesis test to answer this problem staement

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