Site Specific Stem Volume Models for Pinus patula and Pinus oocarpa

Table 3

Parameter estimates, standard errors, and values of the statistics for selected model fitted by use of mixed-effects modelling approach.

Method	Estimated parameters		SE	value		RMSE	AIC
Pinus patula
1			1.7420	<0.001	0.973	0.068	75.40
		1.2792	0.0448	<0.001
		0.2718	0.0103	<0.001
2			0.2014	<0.001	0.998	0.059	55.21
		1.2631	0.0257	<0.001
		0.2557	0.0639	0.004
		0.7131	0.0341	<0.001
Pinus oocarpa
1			0.2360	<0.001	0.958	0.035	23.71
		1.2314	0.0639	<0.001
		0.0764	0.0014	<0.001
2			0.2162	<0.001	0.997	0.024	13.70
		1.2579	0.0512	<0.001
		0.0659	0.0135	<0.001
		0.7118	0.2018	<0.001

Note. Method 1 = selected model fitted without any random parameters. Method 2 = selected model fitted with a random parameter. and are variances for random-effect and residual error, respectively.