The numbers of cars per 1000 inhabitants (cars), the total number of known mortal accidents (deaths), and the country population/1000 (population) for the 25 member countries of the European Union for the year 2004
CARS2004A data frame with 25 observations on the following 4 variables:
country (a factor with levels Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, and United Kingdom)
cars (number of cars per 1000 inhabitants)
deaths (total number of known mortal accidents)
population (country population/1000)
Ugarte, M. D., Militino, A. F., and Arnholt, A. T. 2015. Probability and Statistics with R, Second Edition. Chapman & Hall / CRC.
plot(deaths ~ cars, data = CARS2004)
ggplot(data = CARS2004, aes(x = population, y = deaths, color = cars)) + geom_point()