# Wool

From car v2.1-6
by John Fox

##### Wool data

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.

- Keywords
- datasets

##### Usage

`Wool`

##### 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.

*Documentation reproduced from package car, version 2.1-6, License: GPL (>= 2)*

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