28. A taxi company is trying to decide whether to purchase brand A or brand B tires for its fleet of taxis. To estimate

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28 A Taxi Company Is Trying To Decide Whether To Purchase Brand A Or Brand B Tires For Its Fleet Of Taxis To Estimate 1 (151.6 KiB) Viewed 187 times

28. A taxi company is trying to decide whether to purchase brand A or brand B tires for its fleet of taxis. To estimate the difference in the two brands, an experiment is conducted using 13 of each brand. The tires are run until they wear out. The results are = Brand A: X1 = 36,300 kilometers, Si = 5,000 kilometers. Brand B: X2 = 38,100 kilometers, , S2 = 6,100 kilometers. = of Construct a 90% confidence interval for assuming the populations to be approximately งง normally distributed.