The data consists of levels of biochemical components in brains of mice.
The treatment group received a drug and the control group a placebo.
Usage
data(biochem)
Arguments
Format
A data frame with 22 observations on the following 3 variables.
comp.1
First biochemical component
comp.2
Second biochemical component
group
Factor with the two levels 'Control' and 'Treat'
References
Brown, B. M. and Hettmansperger, T. P. (1987). Affine invariant rank methods in the
bivariate location model. Journal of the Royal Statistical Society, Series B, 49, 301--310.