9.44 Referring to Exercise 9.43, find a 99% confidence interval for -H2 if tires of the two brands are as- signed at random to the left and right rear wheels of 8 taxis and the following distances, in kilometers, are recorded: Taxi Brand A Brand B 1234567 34,400 36,700 45,500 46,800 36,700 37,700 32,000 31,100 48,400 47,800 32,800 36,400 7 38,100 38,900 8 30,100 31,500 Assume that the differences of the distances are ap- proximately normally distributed. 9.43 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 exper- iment is conducted using 12 of each brand. The tires are run until they wear out. The results are Brand A: 136,300 kilometers, 81 5000 kilometers. Brand B: 238, 100 kilometers, 38,100 82 6100 kilometers. Compute a 95% confidence interval for A - B as- suming the populations to be approximately normally distributed. You may not assume that the variances are equal.