Incomes of board members from three different universities
Data for Exercise 10.14
Board
A data frame/tibble with 7 observations on three variables
1999 salary (in $1000) for board directors
a factor with levels A, B, and C
Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.
boxplot(salary ~ university, data = Board, col = c("red", "blue", "green"),
ylab = "Income")
tapply(Board$salary, Board$university, summary)
anova(lm(salary ~ university, data = Board))
## Not run:
library(dplyr)
dplyr::group_by(Board, university) %>%
summarize(Average = mean(salary))
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