Answer to Question #340823 in Statistics and Probability for CInco

Question

The manager of a fleet automobiles is testing two brands of radial tires and assigns

one tire of each brand at random to the two rear wheels of eight cars and runs the

cars until the tires wear out. The data (in kilometers) follow.

Car Brand 1 Brand 2

1 36,925 34,318

2 45,300 42,280

3 36,240 35,500

4 32,100 31,950

5 37,210 38,015

6 48,360 47,800

7 38,200 37,810

8 33,500 33,215

Do the data suggest that the two brands of radial tires prove the same mean life? Use

α = 0.01. [taken from Montgomery, p. 354]

Answer 1

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