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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 estimat e difference in the two brands, an experiment is conducted using 12 of each brand. The tires are run until they wea ut. The results are Brand A: = 36300 km ; SA = 5000 km Brand B: xg = 38100 km ; sR = 6100 km a) Compute a 95% confidence interval for µa - Hg assuming the populations to be approximately normally distributed and variances are inequal. b) Find a 99% confidence interval for µa – µB if a tire from each company is assigned at random to the rea wheels of 8 taxis and the following distance, in kilometers, recorded: Тахi Brand A Brand B 1 34400 36700 2 45500 46800 3 36700 37700 32000 31100 5 48400 47800 6 32800 36400 7 38100 38900 8 30100 31500 Assume that the differences of the distances are approximately normally distributed.

A taxi company is trying to decide: whether to purchase brand A or brand B tires for its fleet of taxis. To estimat e difference in the two brands, an experiment is conducted using 12 of each brand. The tires are run until they wea ut. The results are Brand A: = 36300 km ; SA = 5000 km Brand B: xg = 38100 km ; sR = 6100 km a) Compute a 95% confidence interval for µa - Hg assuming the populations to be approximately normally distributed and variances are inequal. b) Find a 99% confidence interval for µa – µB if a tire from each company is assigned at random to the rea wheels of 8 taxis and the following distance, in kilometers, recorded: Тахi Brand A Brand B 1 34400 36700 2 45500 46800 3 36700 37700 32000 31100 5 48400 47800 6 32800 36400 7 38100 38900 8 30100 31500 Assume that the differences of the distances are approximately normally distributed.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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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 difference in the two brands, an experiment is conducted using 12 of each brand. The tires are run until they wear out. The results are Brand A: = 36300 km ; sa = 5000 km Brand B: īR = 38100 km ; SR = 6100 km a) Compute a 95% confidence interval for Ha – HB assuming the populations to be approximately normally distributed and variances are inequal. b) Find a 99% confidence interval for µa – µB if a tire from each company is assigned at random to the rear wheels of 8 taxis and the following distance, in kilometers, recorded: Тaxi Brand A Brand B 1 34400 36700 2 45500 46800 3 36700 37700 32000 31100 5 48400 47800 32800 36400 7 38100 38900 8 30100 31500 Assume that the differences of the distances are approximately normally distributed.
Transcribed Image Text: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 12 of each brand. The tires are run until they wear out. The results are Brand A: = 36300 km ; sa = 5000 km Brand B: īR = 38100 km ; SR = 6100 km a) Compute a 95% confidence interval for Ha – HB assuming the populations to be approximately normally distributed and variances are inequal. b) Find a 99% confidence interval for µa – µB if a tire from each company is assigned at random to the rear wheels of 8 taxis and the following distance, in kilometers, recorded: Тaxi Brand A Brand B 1 34400 36700 2 45500 46800 3 36700 37700 32000 31100 5 48400 47800 32800 36400 7 38100 38900 8 30100 31500 Assume that the differences of the distances are approximately normally distributed.
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