Number of cycles to failure of samples of worsted yarn in a 33 experiment.

The `wool`

data frame has 27 rows and 4 columns.

1 |

This data frame contains the following columns:

- x1
factor levels: -1, 0, 1

- x2
factor levels: -1, 0, 1

- x3
factor levels: -1, 0, 1

- y
cycles to failure a numeric vector

Atkinson, A.C. and Riani, M. (2000), *Robust Diagnostic Regression Analysis*, First Edition. New York: Springer, Table A.3

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