A)In a study of distances traveled by buses before the first major engine failure, a sample...

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A)In a study of distances traveled by buses before the firstmajor engine failure, a sample of 191 buses results in a mean of96,700 miles and a population standard deviation of 37,500 miles.Calculate the p-value corresponding to the test statistic used totest the claim that the mean distance traveled before a majorengine failure is more than 90,000 miles and determine if the nullhypothesis can be rejected at Î± = .01.

b) A major car manufacturer wants to test a new catalyticconverter to determine whether it meets new air pollutionstandards. The mean emission of all converters of this type must beless than 20 parts per million of carbon. Ten (10) converters aremanufactured for testing purposes and their emission levels aremeasured, with a mean of 17.17 and a standard deviation of 2.98.Test the hypotheses at Î± = .01.

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a Sample size n 191Sample mean 96700Population standard deviation 37500Claim The mean distance traveled before a major engine failureis more than 90000 milesThe null and alternative hypothesis See Answer

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