Toyota USA is studying the effect of regular versus high-octane gasoline on the fuel economy of its new high-performance, 3.5-liter, V6 engine. Ten executives are selected and asked to maintain records on the number of miles traveled per gallon of gas. The results are: Miles per Gallon Miles per Gallon Executive Regular High-Octane Executive Regular High-Octane Bowers 25 28 Rau 38 40 Demars 33 31 Greolke 29 29 Grasser 31 35 Burns 42 37 DeToto 45 44 Snow 41 44 Kleg 42 47 Lawless 30 44 b. State the decision rule. Use the 0.05 significance level. c. Compute the T value.

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