This data gives the mean percentage of butterfat produced by different
Canadian pure-bred diary cattle. There are five different breeds and two age
groups, two years old and greater than five years old. For each combination
of breed and age, there are measurements for 10 cows.
A data frame with 100 observations on 3 variables.
- Butterfat
Numeric mean percentage of butterfat per cow.
- Breed
Factor giving the cattle breed (ayrshire, canadian, guernesy, holst.fres, jersey).
- Age
Factor giving the age group (2yo, mature).
Source
A Handbook of Small Data Sets
References
Hand, D.J., Daly, F., Lunn, A.D., McConway, K.J. and Ostrowski,
E. (1994). A Handbook of Small Data Sets. Boca Raton, Florida:
Chapman and Hall/CRC.
Sokal, R.R. and Rohlf, F.J. (1981). Biometry, 2nd edition. San
Francisco: W.H. Freeman, 368.
