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Table 6 Estimated parameters and goodness of fit of the H–D models for A. araucana, developed on the basis of the fitting database. For estimates for the models fitted to the complete database, see Table 15 in Appendix

From: Determination of optimal tree height models and calibration designs for Araucaria araucana and Nothofagus pumilio in mixed stands affected to different levels by anthropogenic disturbance in South-Central Chile

Parameter

Estimate

SE

RMSE

MAE

R2

AIC

Simple H–D model

 a

25.495801

0.847184

4.311

3.282

0.686

 

 b

2.742643

0.135004

 c

0.026183

0.001789

Simple NLME H–D model

 a

25.803052

0.9713473

4.143

3.120

0.710

2222

 b

2.647948

0.1500307

 c

0.025194

0.0018638

\({\sigma }_{u}^{2}\)

2.0215805

1.4218229

\({\sigma }^{2}\)

0.7835037

0.8851574

\(\delta\)

0.3540391

 

Generalized H–D model

 a0

17.231019

2.140041

4.173

3.090

0.705

 

 a1

0.330946

0.082163

 b0

0.886679

0.441154

 b1

0.011143

0.002890

 c0

0.026182

0.001806

Generalized NLME H–D model

 a0

17.263367

2.2404455

4.148

3.081

0.709

2209

 a1

0.337622

0.0865606

 b0

0.908298

0.4912982

 b1

0.010706

0.0032225

 c0

0.025530

0.0018646

\({\sigma }_{u}^{2}\)

0.1898353

0.4357009

\({\sigma }^{2}\)

0.6266310

0.7916003

\(\delta\)

0.3777712