=+82. Mileage. A recent research states that acetone added to the fuel tank in tiny amounts increases fuel efficiency in cars. Ten randomly selected cars were driven, once without additives and a second time with acetone added. The following miles per gallon were recorded:

Car MPG: No additive MPG: Acetone Added 1 18.3 19.2 2 23.6 22.3 3 31.2 30.9 4 26.3 26.9 5 27.1 28.9 6 16.8 18.6 7 19.8 19.7 8 20.7 21.2 9 14.5 16.5 10 22.0 21.5