Miles per gallon for standard 4-wheel drive trucks manufactured by Chevrolet, Dodge and Ford

Data for Example 10.2

Trucks

Format

A data frame/tibble with 15 observations on two variables

mpg

miles per gallon

truck

a factor with levels chevy, dodge, and ford

References

Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.

Examples

boxplot(mpg ~ truck, data = Trucks, horizontal = TRUE, las = 1)

summary(aov(mpg ~ truck, data = Trucks))
#>             Df Sum Sq Mean Sq F value Pr(>F)
#> truck        2   0.70    0.35     2.5  0.124
#> Residuals   12   1.68    0.14