The data was extracted from the 1974 Motor Trend US magazine, and comprises fuel consumption and 10 aspects of automobile design and performance for 32 automobiles (1973-74 models).
cars74A data frame with 32 rows and 11 variables. The variables are as follows:
highway miles per gallon
Miles/(US) gallon
Number of cylinders
Displacement (cu.in.)
Gross horsepower
Rear axle ratio
Weight (1000 lbs)
1/4 mile time
Engine cylinder configuration
Transmission type
Number of forward gears
Number of carburetors
Henderson and Velleman (1981), Building multiple regression models interactively. Biometrics, 37, 391-411.
This dataset is the mtcars dataset that comes
with base R. However, cyl, vs, am, gear
and carb have been converted
to factors and rownames have been converted to the variable auto.
A description of the variables by Soren Heitmann can be found
here.
summary(cars74)
#> auto mpg cyl disp hp
#> Length:32 Min. :10.40 cyl4:11 Min. : 71.1 Min. : 52.0
#> Class :character 1st Qu.:15.43 cyl6: 7 1st Qu.:120.8 1st Qu.: 96.5
#> Mode :character Median :19.20 cyl8:14 Median :196.3 Median :123.0
#> Mean :20.09 Mean :230.7 Mean :146.7
#> 3rd Qu.:22.80 3rd Qu.:326.0 3rd Qu.:180.0
#> Max. :33.90 Max. :472.0 Max. :335.0
#> drat wt qsec vs am
#> Min. :2.760 Min. :1.513 Min. :14.50 V-shaped:18 automatic:19
#> 1st Qu.:3.080 1st Qu.:2.581 1st Qu.:16.89 straight:14 manual :13
#> Median :3.695 Median :3.325 Median :17.71
#> Mean :3.597 Mean :3.217 Mean :17.85
#> 3rd Qu.:3.920 3rd Qu.:3.610 3rd Qu.:18.90
#> Max. :4.930 Max. :5.424 Max. :22.90
#> gear carb
#> gears3:15 carb1: 7
#> gears4:12 carb2:10
#> gears5: 5 carb3: 3
#> carb4:10
#> carb6: 1
#> carb8: 1