The data arise from an experiment to study the gain in weight of rats fed on four different diets, distinguished by amount of protein (low and high) and by source of protein (beef and cereal).
A data frame with 40 observations on the following 4 variables.
source
source of protein given, a factor with levels Beef and Cereal.
type
amount of protein given, a factor with levels High and Low.
weightgain
weigt gain in grams.
Details
Ten rats are randomized to each of the four treatments. The question of interest is how diet affects weight gain.
Source
D. J. Hand, F. Daly, A. D. Lunn, K. J. McConway and E. Ostrowski (1994). A Handbook of Small Datasets, Chapman and Hall/CRC, London.
Use the following R code to directly access this dataset in R.
