An artificial data set. 24 rats (12 female, 12 male) have been
randomized to use one of three drugs (products for loosing
weight). The weightloss for each rat is noted after one and two
weeks.
Arguments
Format
A data frame with 4 variables.
Sex
a factor with two levels: "M" (male), "F" (female)
Drug
a factor with three levels: "D1", "D2", "D3" (three types)
W1
a numeric: weightloss, week one.
W2
a numeric: weightloss, week 2.
References
Morrison, D.F. (1976). Multivariate Statistical Methods. McGraw-Hill, USA.
Edwards, D. (1995). Introduction to Graphical Modelling,
Springer-Verlag. New York.