The table below shows average fuel efficiency in gallons per 100 miles for foreign and domestic cars before and after adjustment for weight:
| Car Type | Unadjusted | Adjusted |
|---|---|---|
| Foreign | 4.31 | 5.46 |
| Domestic | 5.32 | 4.83 |
Foreign cars use less fuel than domestic cars but are also lighter, when we compare cars with the same weight the imports use six-tenths of a gallon more per 100 miles than the domestic cars.