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

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A Taxi Company Is Trying To Decide Whether To Purchase Brand A Or Brand B Tires For Its Fleet Of Taxis To Estimate The 1 (44.92 KiB) Viewed 13 times

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 8 of each brand, assigned at random to the left and right rear wheels of 8 taxis. The tires are run until they wear out and the distances, in kilometers, are recorded in the accompanying data set. Find a 99% confidence interval for μ₁ −μ₂. Assume that the differences of the distances are approximately normally distributed. Click here to view the data set. Click here to view page 1 of the table of critical values of the t-distribution. Click here to view page 2 of the table of critical values of the t-distribution. Let μ₁ be the population mean for brand A and let μ₂ be the population mean for brand B. The confidence interval is <μ₁ <H₁-H₂< (Round to one decimal place as needed.) Data Set Taxi 1 2 3 4 5 6 7 8 Brand A 44,600 44,800 44,800 42,800 33,500 37,000 43,700 32,000 Brand B 45,500 46,100 46,000 41,800 33,200 40,700 45,500 32,100 X