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You have just been hired by an auto manufacturer. Management wants to know if cars are younger today versus 1995. According to teh Nationwide Personal Transportaion Survey conducted by the U.S. Department of Trasportation, the mean age of a car in 1995 was 8.33 years. Car ages are distributed normally. Based on a random sample of 18 automobile ownersm you obtain x = 7.53 and s = 3.68. are cars younger today? assume that o = 3.8 years. use the a = 0.1 level of significance.

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