Table 3.

Distribution of continuous variables within the data set.

Predictor	Mean	Range	1st quartile	Median	3rd quartile	n
Parity	2.71	1–11	1	2	4	1,170
Days in milk	200.35	0–1,060	92	192	284	1,170
Milk yield (in kg)*	22.91	4.80–51.80	17.12	22.30	28.10	1,170
Farm size	25.60	4.00–61.00	19.00	24.00	30.00	1,170

^*Variable on cow level; values obtained from the most recent sampling record.