drill {Rlab}

Drill testing results

Description

The data set drill contains the results of testing two types of drill bits in the manufacture of compressors. There were two brands considered (Besley and Cleveland), and the measurements are the number of holes drilled until the bit breaks. The tests were done under the same manufacturing conditions, and the influence on performance due to factors other than the brand was minimized.

Format

A data frame with 14 observations on the following 3 variables.

brand

: drill manufacturer (Beasly or Cleveland)

holes

: number of holes drilled before break

price

: price of a bit

Examples

lplot(drill$brand,drill$price/drill$holes,
main='Price per Hole for Drill Bits',ylab='Price per Hole')