Modelling microfibril angle variation in New Zealand-grown radiata pine

New Zealand Journal of Forestry Science

Table 5 Parameter estimates and associated standard errors (s.e.) and tests of significance for the models given by Eqs. (6)-(9)

Parameter	Estimate	s.e.	t-value	p-value
Eq. (6)
α ₀	50.510	0.423	119.295	<0.001
α ₁	0.148	0.002	69.569	<0.001
α ₂	13.209	0.457	28.877	<0.001
α ₃	−51.438	2.625	−19.596	<0.001
α ₄	0.503	0.027	18.576	<0.001
α ₅	2.069	0.510	4.060	<0.001
Eq. (7)
α ₀	15.275	1.117	13.674	<0.001
α ₁	0.335	0.010	34.670	<0.001
α ₂	13.458	0.451	29.871	<0.001
α ₃	−16.783	0.588	−28.566	<0.001
α ₄	0.082	0.004	18.410	<0.001
Eq. (8)
β ₀	−32.156	0.418	−76.850	<0.001
β ₁	3.663	0.138	26.494	<0.001
β ₂	40.178	0.657	61.124	<0.001
β ₃	0.518	0.008	67.041	<0.001
β ₄	−5.462	0.556	−9.818	<0.001
Eq. (9)
β ₀	−32.109	0.407	−78.874	<0.001
β ₁	3.718	0.140	26.509	<0.001
β ₂	36.190	0.710	50.987	<0.001
β ₃	0.517	0.008	66.477	<0.001
β ₄	−1.895	0.154	−12.310	<0.001