. 2013 Feb 22;8(2):e56670. doi: 10.1371/journal.pone.0056670

Table 4. Response of visits to water quality variation (equation 3).

Variable	Coefficient	Std. error	z	p
ln(count)	−0.2565	0.0631	−4.0600	0.0000
ppt	−9.62E−06	1.55E−05	−0.6200	0.5340
June	(dropped)
July	0.5571	0.1016	5.4800	0.0000
Aug	0.5414	0.0986	5.4900	0.0000
yr2004	(dropped)
yr2005	−0.1644	0.1095	−1.5000	0.1330
yr2006	−0.2597	0.1207	−2.1500	0.0310
yr2007	−0.4156	0.1223	−3.4000	0.0010
cons	1.9905	0.2307	8.6300	0.0000
Dependent variable = monthly park visitation
n =	140
Wald chi²	87.39
prob >chi²	0.0000