poison {GLMsData}

Survival times of animals

Description

The survival times of animals under various treatments and poisons

Usage

data(poison)

Format

A data frame with 48 observations on the following 3 variables.

Psn

the type of poison; a vector with levels I, II or III

Trmt

the type of treatment; a vector with levels A, B, C or D

Time

the time to death in ten-hour units; a numeric vector

Details

The data give the time to death of animals using one of three different poisons and one of four treatments. For each of the twelve combinations, four times are recorded.

Source

G. E. P. Box and D. R. Cox (1964) An analysis of transformations (with discussion). Journal of the Royal Statistical Society, Series A. 143, 383–430.

References

The data also appear in D. J. Hand, F. Daly, A. D. Lunn, K. J. McConway, and E. Ostrowski (1994) A Handbook of Small Data Sets, London: Chapman and Hall. Dataset 403.

Examples

data(poison)
summary(poison)