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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