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Table 8 Parameter estimates and their standard error for a CVTS equation, in the form of CVTS = exp(a0 + a1 ln(D) + a2 ln(H)), fitted for Douglas-fir and western hemlock trees. All regression parameters were statistically significant at 5% level of significance

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

a 0

−9.70405

0.04822

−9.98200

0.23210

a 1

1.61812

0.01195

1.37228

0.03673

a 2

1.21071

0.01771

1.57319

0.08084