| ratpup {WWGbook} | R Documentation |
ratpup data in Chapter 3
Description
The data come from a study in which 30 female rats were randomly assigned to receive one of three doses (High, Low, or Control) of an experimental compound.
Usage
data(ratpup)Format
A data frame with 322 observations on the following 6 variables.
- pup.id
: Unique identifier for each rat pup
- weight
: Birth weight of the rat pup (the dependent variable)
- sex
: Sex of the rat pup (Male, Female)
- litter
: Litter ID number
- litsize
: Litter size (i.e., number of pups per litter)
- treatment
: Dose level of the experimental compound assigned to the litter (High, Low, Control)
References
Pinheiro, J.C. and Bates, D.M., Mixed-effects models in S and S-PLUS, Springer-Verlag Inc., Berlin, New York, 2000.
West, B., Welch, K. & Galecki, A, Linear Mixed Models: A Practical Guide Using Statistical Software, Chapman Hall / CRC Press, first edition, 2006.
Examples
str(ratpup)