The health of females burros in the Mojave Desert.
data(Burros)A data frame with 9 rows and 3 columns:
The reproductive status of the female burro;
one of 1 (barren), 2 (pregnant (but not lactating)),
or 3 (lactating)
The health of the burro;
one of 1 (excellent), 2 (fair) or 3 (poor).
The number of female burros in each cell
The data provide the number of female burros of given health and reproductive status.