| Cows {PASWR} | R Documentation |
Random samples of ten mature (five-year-old and older) and ten
two-year-old cows were taken from each of five breeds. The average
butterfat percentage of these 100 cows is stored in the variable
butterfat with the type of cow stored in the variable
breed and the age of the cow stored in the variable age.
Cows
A data frame with 100 observations on the following 3 variables:
butterfatage2 years old and MaturebreedAyrshire, Canadian,
Guernsey, Holstein-Friesian, and JerseyCanadian record book of purebreed diary cattle.
Sokal, R. R. and Rohlf, F. J. (1994) Biometry. W. H. Freeman, New York, third edition.
attach(Cows) summary(aov(butterfat~breed+age)) detach(Cows)