Number of problems reported per 100 cars in 1994 versus 1995s
Data for Exercise 2.14, 2.17, 2.31, 2.33, and 2.40
Jdpower
A data frame/tibble with 29 observations on three variables
a factor with levels Acura, BMW,
Buick, Cadillac, Chevrolet, Dodge Eagle,
Ford, Geo, Honda, Hyundai, Infiniti,
Jaguar, Lexus, Lincoln, Mazda, Mercedes-Benz,
Mercury, Mitsubishi, Nissan, Oldsmobile,
Plymouth, Pontiac, Saab, Saturn, and Subaru,
Toyota Volkswagen, Volvo
number of problems per 100 cars in 1994
number of problems per 100 cars in 1995
USA Today, May 25, 1995.
Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.
model <- lm(`1995` ~ `1994`, data = Jdpower) summary(model) plot(`1995` ~ `1994`, data = Jdpower) abline(model, col = "red") rm(model)
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