Grade point averages of men and women participating in various sports-an illustration of Simpson's paradox
Data for Example 1.18
Simpson
A data frame/tibble with 100 observations on three variables
grade point average
sport played (basketball, soccer, or track)
athlete sex (male, female)
Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.
boxplot(gpa ~ gender, data = Simpson, col = "violet")
boxplot(gpa ~ sport, data = Simpson, col = "lightgreen")
## Not run:
library(ggplot2)
ggplot2::ggplot(data = Simpson, aes(x = gender, y = gpa, fill = gender)) +
geom_boxplot() +
facet_grid(.~sport) +
theme_bw()
## End(Not run)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.