Engineers at a large automobile manufacturing company are
Chapter , Problem 6.36(choose chapter or problem)
Engineers at a large automobile manufacturing company are trying to decide whether to purchase brand A or brand B tires for the companys new models. To help them arrive at a decision, an experiment is conducted using 12 of each brand. The tires are run until they wear out. The results are as follows: Brand A : x1 = 37,900 kilometers, s1 = 5100 kilometers. Brand B : x2 = 39,800 kilometers, s2 = 5900 kilometers. Test the hypothesis that there is no difference in the average wear of the two brands of tires. Assume the populations to be approximately normally distributed with equal variances. Use a P-value.
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