Computers in some vehicles calculate various quantities relatedto performance. One of these is the fuel efficiency, or gasmileage, usually expressed as miles per gallon (mpg). For onevehicle equipped in this way, the miles per gallon were recordedeach time the gas tank was filled, and the computer was then reset.In addition to the computer calculating miles per gallon, thedriver also recorded the miles per gallon by dividing the milesdriven by the number of gallons at fill-up. The driver wants todetermine if these calculations are different.
| Fill-up | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| Computer | 41.4 | 50.6 | 36.8 | 37.3 | 34.2 | 44.7 | 47.9 | 43.2 | 47.4 | 42.1 |
| Driver | 36.5 | 44.2 | 37.2 | 35.6 | 30.5 | 40.5 | 40.0 | 41.0 | 42.8 | 39.2 |
| Fill-up | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| Computer | 43.0 | 44.5 | 48.3 | 46.3 | 46.9 | 39.3 | 37.5 | 43.6 | 44.3 | 43.1 |
| Driver | 38.8 | 44.5 | 45.4 | 45.3 | 45.7 | 34.2 | 35.2 | 39.8 | 44.9 | 47.5 |
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(b) Carry out the test. (Round your answer for t tofour decimal places.)
t =?
(c) Give the degrees of freedom.
(d) Give the P-value. (Round your answer to fourdecimal places.)
