On this Picostat.com statistics page, you will find information about the Wool data set which pertains to Wool data. The Wool data set is found in the car R package. You can load the Wool data set in R by issuing the following command at the console data("Wool"). This will load the data into a variable called Wool. If R says the Wool data set is not found, you can try installing the package by issuing this command install.packages("car") and then attempt to reload the data. If you need to download R, you can go to the R project website. You can download a CSV (comma separated values) version of the Wool R data set. The size of this file is about 396 bytes.

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

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

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.

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Dataset imported from https://www.r-project.org.