Tire Wear

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Description

The data frame TireWear contains measurements for the amount of tread loss after 10,000 miles of driving in thousandths of an inch. Data are used in Example 11.8.

Usage

1

Format

A data frame with 16 observations on the following 3 variables:

Wear

tread loss measured in thousandths of an inch

Treat

a factor with levels A, B, C, and D

Block

a factor with levels Car1, Car2, Car3, and Car4

Source

Ugarte, M. D., Militino, A. F., and Arnholt, A. T. (2008) Probability and Statistics with R. Chapman & Hall/CRC.

Examples

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par(mfrow=c(1,2), cex=.8)
with(data = TireWear,
interaction.plot(Treat,Block,Wear, type="b", legend=FALSE))
with(data = TireWear, 
interaction.plot(Block,Treat,Wear, type="b", legend=FALSE))
par(mfrow=c(1,1), cex=1)

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