poisons {boot} | R Documentation

## Animal Survival Times

### Description

The `poisons` data frame has 48 rows and 3 columns.

The data form a 3x4 factorial experiment, the factors being three poisons and four treatments. Each combination of the two factors was used for four animals, the allocation to animals having been completely randomized.

### Usage

    poisons

### Format

This data frame contains the following columns:

`time`
  The survival time of the animal in units of 10 hours.
`poison`
  A factor with levels `1`, `2` and `3` giving the type of poison used.
`treat`
  A factor with levels `A`, `B`, `C` and `D` giving the treatment.

### Source

The data were obtained from

Box, G.E.P. and Cox, D.R. (1964) An analysis of transformations (with Discussion). Journal of the Royal Statistical Society, B, 26, 211–252.

### References

Davison, A.C. and Hinkley, D.V. (1997) Bootstrap Methods and Their Application. Cambridge University Press.

[Package boot version 1.2-24 Index]