Average butterfat content (percentages) of milk for random samples of twenty
cows (ten two-year old and ten mature (greater than four years old)) from
each of five breeds. The data are from Canadian records of pure-bred dairy
cattle.
Arguments
Format
A data frame with 100 observations on the following 3 variables.
Butterfat
butter fat content by percentage
Breed
a factor with levels AyrshireCanadianGuernseyHolstein-FresianJersey