The data consist of 5 weekly measurements of body weight for 27 rats. The first 10 rats are on a control treatment while 7 rats have thyroxine added to their drinking water. 10 Rats have thiouracil added to their water.
data(ratdrink)
A data frame with 135 observations on the following 4 variables.
wt
Weight of the rat
weeks
Week of the study from 0 to 4
subject
the rat code number
treat
treatment applied to the rat drinking water - a factor with levels control
thiouracil
thyroxine