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Forest Ecosystems

Table 6 Parameter estimates and their standard error for Kozak (2004) model fitted for Douglas-fir and western hemlock trees. Parameters b4 and b7 were associated with tree specific random effects

From: Estimating upper stem diameters and volume of Douglas-fir and Western hemlock trees in the Pacific northwest

Parameter

Douglas-fir

Western Hemlock

Estimate

SE

Estimate

SE

b 1

1.00403

0.01382

0.80993

0.06838

b 2

0.98460

0.00667

0.97170

0.02351

b 3

− 0.00670*

0.00840

0.08714

0.03534

b 4

0.49856

0.00678

0.52283

0.02270

b 5

−0.85726

0.03014

−1.09100

0.10853

b 6

0.54275

0.00916

0.72762

0.02775

b 7

4.47089

0.17168

2.17953

0.92582

b 8

0.04682

0.00116

0.03593

0.00637

b 9

−0.41454

0.01195

−0.32003

0.05524

φ

0.77593

 

0.74885

 

δ

−0.38306

 

−0.71222

 
  1. *Coefficient statistically not significant at α = 0.05 (p-value = 0.4); φ= Estimate of first-order continuous autoregressive parameter; δ= Power of the variance weighting factor
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