Data for Exercise 1.20
DomesticA data frame/tibble with five observations on two variables
a factor with levels 12-19, 20-24,
25-34, 35-49, and 50-64
rate of domestic violence per 1000 women
U.S. Department of Justice.
Kitchens, L. J. (2003) Basic Statistics and Data Analysis. Pacific Grove, CA: Brooks/Cole, a division of Thomson Learning.