A consumer advocacy group is doing a large study on car rental practices. Among other things, the consumer group would l

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A Consumer Advocacy Group Is Doing A Large Study On Car Rental Practices Among Other Things The Consumer Group Would L 1 (48.12 KiB) Viewed 71 times

A consumer advocacy group is doing a large study on car rental practices. Among other things, the consumer group would like to do a statistical test regarding the mean monthly mileage, u, of cars rented in the U.S. this year. The consumer group has good reason to believe that the mean monthly mileage of cars rented in the U.S. this year is less than last year's mean, which was 2750 miles. The group plans to do a statistical test regarding the value of u. It chooses a random sample of monthly mileages and computes the mean of the sample to be 2575 miles and the standard deviation to be 700 miles. Based on this information, complete the parts below. (a) What are the null hypothesis H, and the alternative hypothesis H, that should be used for the test? р x XI . H:0 ロ<ロ OSO D> H : DO ローロ (b) Suppose that the group decides to reject the null hypothesis. What sort of error might it be making? (Choose one) x Х $ ? (C) Suppose the true mean monthly mileage of cars rented in the U.S. this year is 2750. Fill in the blanks to describe a Type I error. the hypothesis that u is Choose one) (Choose one) A Type I error would be (Choose one) when, in fact, u is (Choose one)