The U.S. Department of Energy’s Fuel Economy Guide provides fuel efficiency data forcars and trucks (Fuel Economy website, February 22, XXXXXXXXXXA portion of the data for 311compact, midsize, and...

The U.S. Department of Energy’s Fuel Economy Guide provides fuel efficiency data for cars and trucks (Fuel Economy website, February 22, 2008). A portion of the data for 311 compact, midsize, and large cars is shown in Table 2.14. The data set contains the following variables: Size: Compact, Midsize, and Large Displacement: Engine size in liters Cylinders: Number of cylinders in the engine Drive: Front wheel (F), rear wheel (R), and four wheel (4) Fuel Type: Premium (P) or regular (R) fuel City MPG: Fuel efficiency rating for city driving in terms of miles per gallon Hwy MPG: Fuel efficiency rating for highway driving in terms of miles per gallon