Table 5.

Mid-Columbia SSN model covariate raw (Raw) and standardized (Std.) coefficient estimates (Est), standard errors (SE), t-statistics (t), and p-values (p). Parameter abbreviations as in Table 1. Covariates ordered from largest to smallest absolute value of the standardized coefficient estimate (“Std. Est”).

Covariate	Raw Est	Raw SE	Std. Est	Std. SE	T	p
elevation	−0.0049	0.000357	−4.381	0.319	−13.741	<<0.001
tailwater	−4.07	0.909	−4.071	0.909	−4.479	<<0.001
lake	0.716	0.073	1.764	0.180	9.806	<<0.001
bfi	−0.0931	0.0188	−1.693	0.342	−4.947	<<0.001
precipitation	−0.00119	0.000277	−1.323	0.309	−4.28	<<0.001
shade	−0.024	0.00319	−1.072	0.142	−7.543	<<0.001
latitude	−0.00000676	0.00000289	−1.070	0.457	−2.342	0.019
air	0.413	0.0702	0.726	0.123	5.875	<<0.001
drainage	0.000064	0.0000478	0.195	0.145	1.339	0.181
slope	−3.71	2.19	−0.189	0.112	−1.692	0.091
discharge	−0.0845	0.0851	−0.140	0.141	−0.992	0.321