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(Solved): It is necessary for an automobile producer to estimate the number of miles per gallon achieved by i ...



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It is necessary for an automobile producer to estimate the number of miles per gallon achieved by its cars. Suppose that the sample mean for a random sample of 140 cars is 28.6 miles and assume the standard deviation is 2.7 miles. Now suppose the car producer wants to test the hypothesis that , the mean number of miles per gallon, is 29.2 against the alternative hypothesis that it is not 29.2 . Conduct a test using by giving the following: (a) positive critical score (b) negative critical score (c) test statistic The final conclustion is A. There is not sufficient evidence to reject the null hypothesis that . B. We can reject the null hypothesis that and accept that .


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