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

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