drill.advance: Drill advance

In clayford/dvdata: Data Files for Design and Analysis of Experiments (Dean & Voss)

Drill advance

Description

A single replicate 2 x 2 x 2 experiment to study the effects of four treatment factors on the rate of advance of a small stone drill. (Chapter 7, Table 7.4)

Usage

drill.advance

Format

A data frame with 16 rows and 6 variables:

A

load on the drill

B

flow rate through the drill

C

speed of rotation

D

type of mud used in drilling

ADV

measure of drill advance

LN_ADV

log to base 10 of drill advance

Source

http://www.wright.edu/~dan.voss/bookdata/data.html

References

Dean, A. and Voss, D. (1999). Design and Analysis of Experiments. New York, Springer.

Examples

apply(drill.advance[,1:4],2,table) # each factor observed at 2 levels
aov1 <- aov(LN_ADV ~ A + B + C + D, data=drill.advance)
summary(aov1)
coef(aov1)
op <- par(mfrow=c(2,2))
for(i in LETTERS[1:4]){
  plot(TukeyHSD(aov1, i))
}
par(op)

clayford/dvdata documentation built on June 11, 2025, 8:43 a.m.