teratology2 {catdata}

Teratology2

Description

In a teratology experiment 58 rats on iron-deficient diets were assigned to four groups. In the first group only placebo injections were given, in the other groups iron supplements were given. The animals were made pregnant and sacrificed after three weeks. The response was whether the fetus was dead (yij = 1) for each fetus in each rats litter.

Usage

data(teratology2)

Format

A data frame with 607 observations on the following 3 variables.

y

dead = 1, living = 0

Rat

Number of animal

Grp

treatment group

References

Moore, D. F. and Tsiatis, A. (1991) Robust estimation of the variance in moment methods for extra-binomial and extra-poisson variation. Biometrics 47, 383–401.

Examples

## Not run: 
data(teratology2)
if(interactive()){vignette("altbin-teratology")}

## End(Not run)