A consumer products testing group is evaluating two competing brands of tires, Brand 1 and Brand 2. Tread wear can vary considerably depending on the type of car, and the group is trying to eliminate this effect by installing the two brands on the same random sample of 12 cars. In particular, each car has one tire of each brand on its front wheels, with half of the cars chosen at random to have Brand 1 on the left front wheel, and the rest to have Brand 2 there. After all of the cars are driven over the standard test course for 20,000 miles, the amount of tread wear (in inches) is recorded, as shown in the table below. Difference Car Brand 1 Brand 2 (Brand 1- Brand 2) 0.36 0.43 -0.07 0.24 0.07 0.17 0.39 1.25 -0.86 4 0.22 1.26 -1.04 0.35 0.12 0.23 0.31 0.70 -0.39 0.32 0.61 -0.29 8 0.39 1.04 -0.65 0.40 0.55 -0.15 10 0.31 0.70 -0.39 11 0.36 0.43 -0.07 12 0.38 1.34 -0.96 Send data to calculator
A consumer products testing group is evaluating two competing brands of tires, Brand 1 and Brand 2. Tread wear can vary considerably depending on the type of car, and the group is trying to eliminate this effect by installing the two brands on the same random sample of 12 cars. In particular, each car has one tire of each brand on its front wheels, with half of the cars chosen at random to have Brand 1 on the left front wheel, and the rest to have Brand 2 there. After all of the cars are driven over the standard test course for 20,000 miles, the amount of tread wear (in inches) is recorded, as shown in the table below. Difference Car Brand 1 Brand 2 (Brand 1- Brand 2) 0.36 0.43 -0.07 0.24 0.07 0.17 0.39 1.25 -0.86 4 0.22 1.26 -1.04 0.35 0.12 0.23 0.31 0.70 -0.39 0.32 0.61 -0.29 8 0.39 1.04 -0.65 0.40 0.55 -0.15 10 0.31 0.70 -0.39 11 0.36 0.43 -0.07 12 0.38 1.34 -0.96 Send data to calculator
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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