Table 1.

Coefficients of fitted model for daily mean optical flow.

	coefficient	value	d.f.	t-value	p-value
company 1	intercept	0.8769	532	12.1832	0.0000
	CampPos	−0.0917	18	−1.0789	0.2949
	temperature	0.0079	18	1.4207	0.1725
	oAge1CampPos	0.1717	532	1.0858	0.2781
	oAge2CampPos	−0.0188	532	−0.3002	0.7642
	oAge3CampPos	−0.1257	532	−5.6008	0.0000
	oAge4CampPos	0.0168	532	0.7506	0.4532
company 2	intercept	−1.4182	158	−0.1893	0.8501
	CampPos	0.6668	4	0.1624	0.8789
	temperature	−0.1523	4	−0.2271	0.8315
	oAge1CampPos	−0.1162	158	−0.5932	0.5539
	oAge2CampPos	−0.0770	158	−0.3655	0.7152
	oAge3CampPos	−0.0838	158	−0.8029	0.4233
	oAge4CampPos	0.2153	158	3.1551	0.0019