oyota USA is studying the effect of regular versus high-octanegasoline on the fuel economy of its new high-performance,3.5-liter, V6 engine. Ten executives are selected and asked tomaintain records on the number of miles traveled per gallon of gas.The results are:
a. STATE THE NULL HYPOTHESIS AND ALTERNATE HYPOTHESIS
| 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 |
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