1000 individuals classified according to sex (M,F) and geographical area (area1 to area4).
Collected variables: yearly data on income, number of books read, total days of sporting activities.
Usage
data(pop)
Arguments
Format
A data frame with 1000 observations on the following 4 variables.
strata
a factor with levels F_area1F_area2F_area3F_area4M_area1M_area2M_area3M_area4