Essay
Engine Wear To compare the wearing of two types of automobile engines, 1 and 2, an experimenter chose to "pair" the measurements, comparing the wear for the two types of engines on each of 7 automobiles, as shown below. 
{Engine Wear Narrative} Estimate with 90% confidence the mean difference and interpret.
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- 1.0 ± 1.587. Thus, LCL = - 2.587, and ...View Answer
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