car (version 2.1-6)

Wool: Wool data

Description

This is a three-factor experiment with each factor at three levels, for a total of 27 runs. Samples of worsted yarn were with different levels of the three factors were given a cyclic load until the sample failed. The goal is to understand how cycles to failure depends on the factors.

Usage

Wool

Arguments

Format

This data frame contains the following columns:

len

length of specimen (250, 300, 350 mm)

amp

amplitude of loading cycle (8, 9, 10 min)

load

load (40, 45, 50g)

cycles

number of cycles until failure

References

Fox, J. and Weisberg, S. (2011) An R Companion to Applied Regression, Second Edition, Sage.

Weisberg, S. (2014) Applied Linear Regression, Fourth Edition, Wiley, Section 6.3.