wool: Wool data

Description Format Source References Examples

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.

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

Source

Box, G. E. P. and Cox, D. R. (1964). An analysis of transformations (with discussion). J. Royal Statist. Soc., B26, 211-46.

References

Weisberg, S. (2005). Applied Linear Regression, 3rd edition. New York: Wiley, Section 6.3.

Examples

1


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