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. (2014). Applied Linear Regression, 4th edition. Hoboken NJ: Wiley.
Loading required package: car Loading required package: carData Loading required package: effects Registered S3 methods overwritten by 'lme4': method from cooks.distance.influence.merMod car influence.merMod car dfbeta.influence.merMod car dfbetas.influence.merMod car lattice theme set by effectsTheme() See ?effectsTheme for details. Feed Speed Life 1 -1 -1 54.5 2 -1 -1 66.0 3 1 -1 11.8 4 1 -1 14.0 5 -1 1 5.2 6 -1 1 3.0
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