roadwear {slgf}

Roadwear data on four tires, each comprising three compounds, from a balanced incompleted block design.

Description

Davies (1954) analyzes the wear on four tires, where each tire comprises three distinct compounds.

Usage

data(roadwear)

Format

A data frame with 12 rows and 3 variables:

abrasion

the measurement of abrasion.

compound

the compound from which each measurement was taken, either A, B, C, or D.

tire

the tire from which each measurement was taken, either 1, 2, 3, or 4.

References

Davies OL (1954). The Design and Analysis of Industrial Experiments. Oliver and Boyd, London.