Size of family versus cost per person per week for groceries
Data for Exercise 2.89
Family
A data frame/tibble with 20 observations on two variables
number in family
cost per person (in dollars)
Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.
plot(cost ~ number, data = Family)
abline(lm(cost ~ number, data = Family), col = "red")
cor(Family$cost, Family$number)
## Not run:
library(ggplot2)
ggplot2::ggplot(data = Family, aes(x = number, y = cost)) +
geom_point() +
geom_smooth(method = "lm") +
theme_bw()
## End(Not run)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.