These data are the results of an experiment to study the performance of cutting-tool material in cutting steel on a lathe. The two factors are revolution speed and feed rate. The response is tool life in minutes.
This data frame contains the following columns:
Coded feed rate, coded as (actual feed rate -13)/6. Feed is in thousandths of an inch per revolution.
Coded speed, coded as (actual speed -900)/300. Speed is in feet per minute.
Life of tool until failure, minutes
M. R. Delozier
Weisberg, S. (2005). Applied Linear Regression, 3rd edition. New York: Wiley, Problem 6.3.