For a sample of nine automobiles, the mileage (in 1000s of
Chapter 5, Problem 7E(choose chapter or problem)
For a sample of nine automobiles, the mileage (in 1000s of miles) at which the original front brake pads were worn to 10% of their original thickness was measured, as was the mileage at which the original rear brake pads were worn to 10% of their original thickness. The results are given in the following table.
Find a 95% confidence interval for the difference in mean lifetime between the front and rear brake pads.
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