Table 4.

Univariate regression analysis of each variable used for predicting water consumption (kg/d) of crossbred steers

Variable	Slope estimate	SE	R 2	P-value
All data
DMI, kg	2.17	0.029	0.12	<0.0001
MWTS, kg	0.61	0.008	0.13	<0.0001
Average temperature, oC	0.65	0.006	0.21	<0.0001
Relative humidity, %	-0.18	0.005	0.03	<0.0001
Solar radiation, MJ/m2	0.72	0.008	0.19	<0.0001
Wind speed, km/h	-0.08	0.018	0.0005	<0.0001
Summer
DMI, kg	2.74	0.042	0.16	<0.0001
MWTS, kg	0.59	0.011	0.10	<0.0001
Average temperature, oC	1.74	0.023	0.20	<0.0001
Relative humidity, %	-0.52	0.010	0.12	<0.0001
Solar radiation, MJ/m2	0.67	0.014	0.09	<0.0001
Wind speed, km/h	-0.04	0.032	0.0001	<0.0001
Winter
DMI, kg	2.25	0.028	0.29	<0.0001
MWTS, kg	0.53	0.009	0.20	<0.0001
Average temperature, oC	0.39	0.013	0.06	<0.0001
Relative humidity, %	-0.52	0.010	0.12	<0.0001
Solar radiation, MJ/m2	0.67	0.014	0.09	<0.0001
Wind speed, km/h	-0.04	0.032	0.0001	0.2120
Ad libitum
DMI, kg	1.62	0.058	0.05	<0.0001
MWTS, kg	0.66	0.014	0.14	<0.0001
Average temperature, oC	0.76	0.010	0.26	<0.0001
Relative humidity, %	-0.06	0.009	0.003	<0.0001
Solar radiation, MJ/m2	0.89	0.014	0.22	<0.0001
Wind speed, km/h	-0.18	0.028	0.003	<0.0001
Slick bunk
DMI, kg	2.15	0.033	0.15	<0.0001
MWTS, kg	0.48	0.011	0.08	<0.0001
Average temperature, oC	0.58	0.008	0.19	<0.0001
Relative humidity, %	-0.18	0.007	0.03	<0.0001
Solar radiation, MJ/m2	0.64	0.008	0.19	<0.0001
Wind speed, km/h	0.02	0.023	0.00	0.5097

^aDMI = Dry mater intake, MWTS = mid metabolic body weight.