car_no_ wo_mpg with_mpg 1 21 20.6 2 30 29.9 3 29.8 30.7 4 27.3 26.5 5 27.7 26.7 6 33.1 32.8 7 18.8 21.7 8 26.2 28.2 9 28 28.9 10 18.9 19.9 11 29.3 32.4 12 21 22