Table 4. Analysis of covariance (ANCOVA) and multiple linear regression model with parameter estimates of age and crown class to predict annual height increment (cm/year) of saplings.

Analysis of covariance (ANCOVA)						Multiple linear regression model (Radj2=0.869, Sx·y=19.61)
Source	DF	Sum Sq	Mean Sq	F value	Pr > F	Effect	Estimate	Std. Error	t Value	Pr > |t|
Age	1	335326.2	335326.2	870.3	<0.0001	Age	2.6788	0.0921	29.08	<0.0001
Crown class	3	148200.2	49400.1	128.2	<0.0001	Dominant	34.7617	0.9196	37.80	<0.0001
Residuals	2504	964789.8	385.3			Codominant	23.9102	1.0531	22.70	<0.0001
						Intermediate	19.7140	1.4137	13.95	<0.0001
						Suppressed	14.5882	1.2571	11.60	<0.0001