hcc (version 0.54)

rubber: Abrasion loss for various hardness and tensile strength

Description

The data come from an experiment to investigate how the resistance of rubber to abrasion is affected by the hardness of the rubber and its tensile strength.

Usage

data(rubber)

Format

A data frame with 30 observations on the following 3 variables.

hardness

hardness in degree Shore

tensile.strength

tensile strength in kg per square meter

abrasion.loss

abrasion loss in gram per hour

ts.low

tensile strength minus the breakpoint 180 km/m^2

ts.high

tensile strength minus the breakpoint 180 km/m^2

Source

Hand, D.J., Daly, F., Lunn, A.D., McConway, K.J. and Ostrowski, E. (1993). A Handbook of Small Datasets. Chapman and Hall.

References

Cleveland, W. S. (1993). Visualizing data. Hobart Press, Summit: New Jersey. Davies, O.L. and Goldsmith, P.L.(1972) Statistical methods in Research and Production.

Examples

data(rubber)
rmod <- lm(abrasion.loss~hardness+tensile.strength, data=rubber)
res <- resid(rmod)
hctest(rubber[,1], res)