Testing Hypotheses: One Sample Tests

Drive-a-Lemon rents cars that are mechanically sound, but older than those rented by the large national rent-a-car chains. As a result, it advertises that its rates are consider- ably lower than rates of its larger competitors. An industry survey has established that the average total charge per rental at one of the major firms is $77.38. A random sample of 18 completed transactions at Drive-a-Lemon showed an average total charge of $87.61 and a sample standard deviation of’ $19.48. Verify that at a = 0.025, Drive-a-Lemon’s average total charge is significantly higher than that of the major firms. Does this result indicate that Drive-a-Lemon’s rates,’ in fact, are not lower than the rates charged by the major national chains? Explain

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