The data come 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).
Usage
WEIGHTGAIN
Arguments
Format
A data frame with 40 observations on the following 3 variables:
proteinsource (a factor with levels Beef and Cereal)
proteinamount (a factor with levels High and Low)
weightgain (weight gained in grams)
Details
The design of the experiment is a completely randomized design with ten rats in each of the four treatments.
References
Ugarte, M. D., Militino, A. F., and Arnholt, A. T. 2015. Probability and Statistics with R, Second Edition. London: Chapman & Hall.
# NOT RUN {ggplot(data = WEIGHTGAIN, aes(x = proteinamount, y = weightgain,
fill = proteinsource)) + geom_boxplot()
aov(weightgain ~ proteinsource*proteinamount, data = WEIGHTGAIN)
# }