The SAS System    18:11 Saturday, September 17, 2011   1

                                   engine_                 transmission_
   Obs   year   make     model       size    n_cylinders       type        city_mpg   hwy_mpg

    1    2011   Ford     Fiesta      1.6          6          Manual           28         37
    2    2011   Ford     Fiesta      1.6          6          Automatic        29         38
    3    2011   Ford     Mustang     3.7          6          Manual           15         23
    4    2011   Ford     Mustang     3.7          6          Automatic        19         31
    5    2011   Ford     Mustang     5.0          8          Manual           15         25
    6    2011   Ford     Mustang     5.0          8          Automatic        20         26
    7    2011   Toyota   Prius       1.8          4          Automatic        40         60