Biomass Modelling of Androstachys johnsonii Prain: A Comparison of Three Methods to Enforce Additivity

Table 9

-test for the restriction imposed for weighted SUR.

Restriction	DF	Parameter estimate	Standard error	value
	−1	0.6255	0.1204	5.2	<0.0001
	−1	2230.6100	355.5158	6.27	<0.0001
	−1	390.4832	43.5058	8.98	<0.0001
	−1	227.0888	24.8863	9.13	<0.0001
	−1	4.7892	1.4875	3.22	0.0010

Note: the restrictions are as stated in (4).