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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