Predicting crown width and length using nonlinear mixed-effects models: a test of competition measures using Chinese fir (Cunninghamia lanceolata (Lamb.) Hook.)

Table 8 The lack-of-fit statistics of the crown width mixed-effects model using different variance functions

Model	Variance function	AIC	BIC	− 2LL (df)	L.Ratio	p value
(14)	None	1571	1613	1554.91 (8)
(14.1)	ConstPower	1568	1621	1548.23 (10)	6.69^b	0.0353
(14.2)	Power	1568	1615	1549.67 (9)	5.24^b	0.0220
(14.3)	Exponent	1567	1614	1548.54 (9)	6.38^b	0.0116

AIC, Akaike information criterion; BIC, Bayesian information criterion; − 2LL (df), − 2 log-likelihood (degree of freedom). ^bL.Ratio, the value of likelihood ratio test, which was calculated with respect to model (14)

ISSN: 1297-966X