Table 2.

Summary statistics from data used in random regression analyses for temperament traits

	Linear1			Quadratic2
	PS3	EV	TS	PS	EV	TS
Total records	9,831	10,099	9,798	9,831	10,099	9,798
Total animals	3,922	4,004	3,906	3,922	4,004	3,906
Records analyzed	8,070	8,373	8,048	6,758	6,988	6,740
Animals with records	2,165	2,282	2,160	1,508	1,588	1,505
Mean	2.83	2.61	2.709	2.84	2.59	2.71
SD	1.012	1.108	0.92	1.001	1.104	0.911
Minimum	1	0.22	0.61	1	0.22	0.61
Maximum	5	6.674	6.527	5	6.671	6.118
Age (d)
Mean	242.61	243.34	242.67	250.7	251.06	250.74
SD	67.198	68.611	67.216	69.099	70.535	69.095

¹All records of animals with less than two records were removed for linear random regression analyses.

²All records of animals with less than three records were removed for quadratic random regression analyses.

³PS = pen score, a subjective measure of temperament, in which reactions of an individual calf to a constant experienced evaluator within a pen of three to five calves are scored on a scale of 1 to 5 (1 = calm, 5 = excitable). EV = exit velocity, an objective measure of temperament, defined as the rate (m/s) in which a calf travels 1.83 m upon immediately exiting a squeeze chute. TS = temperament score, numerical average of pen score and exit velocity.