Salary of faculty in a small Midwestern college in the early 1980s.
This data frame contains the following columns:
Factor with levels "PhD" or "Masters"
Factor, "Asst", "Assoc" or "Prof"
Factor, "Male" or "Female"
Years in current rank
Years since highest degree earned
dollars per year
Weisberg, S. (2014). Applied Linear Regression, 4th edition. Hoboken NJ: Wiley.