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.
|[,1]||Butterfat||numeric||Mean percentage of butterfat per cow|
|[,2]||Breed||factor||Breed (ayrshire, canadian, guernesy, holst.fres, jersey)|
|[,3]||Age||factor||Age group (2yo, mature)|
A Handbook of Small Data Sets
Hand, D.J., Daly, F., Lunn, A.D., McConway, K.J. \& Ostrowski, E. (1994). A Handbook of Small Data Sets. Boca Raton, Florida: Chapman and Hall/CRC.
Sokal, R.R. \& Rohlf, F.J. (1981). Biometry, 2nd edition. San Francisco: W.H. Freeman, 368.
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