Question

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 95% confidence interval for H, - Hy. 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 distribution i Data Set Let, be the population mean for brand A and let us be the population mean for brand B. The confidence interval is -42- (Round to one decimal place as needed.) Taxi Brand A 37,700 46,800 36,500 40,600 43.600 31,300 37,600 43.800 Brand B 39,800 47,500 37.100 39,200 42,900 36,000 38,700 45,000 Print Done Enter your answer in the edit fields and then click Check Answer. All parts showing

Answer 1

2 Brand A 41216 95% 1 for ४৭,१०० 39 80 46,800 47 Soo wher w SS2 hi n2 36, 500 37100 40,600 39 200 )2. 43, 600 Si= 42900 36000 31 300 P fN Brend A, nie & X=39737.= 4963 27 for Brend Bn1= 0, y uo75 37, 600 4300 38700 45 00 0 =3993.u76 3079256.14+1993 482-13 Su 72 745.87 Su2252 275 L(39737 5-40775)+ 196x 2252.27s) [-1०37. 5+ ५५ाप.५ऽ१] -5 451.951, 3376.959