Table 2.

Optimum weights in the selection index for the simulated population, and p-values of the tests of whether setting the weights equal to zero would provide lower profit

Information source	Index coef.	Directional selection	Stabilizing selection	p-value
${\text{EBV}}_i$	$b_1$	0.26	− 0.26 to 0.26	$4.4·{10}^{-20}$
${\text{EBV}}_i^2$	$b_2$	− 0.06	− 0.26 to 0	$1.3·{10}^{-13}$
${\text{X}}_{i1}$	$b_3$	0.46	0.08	$1.2·{10}^{-13}$
${\text{X}}_{i2}$	$b_4$	− 0.04	− 0.42	$1.0·{10}^{-08}$
${\text{H}}_{i1}$	$b_5$	0.18	− 0.22	$3.2·{10}^{-04}$
${\text{H}}_{i2}$	$b_6$	0.00	− 0.02	0.02

The p-values are obtained with t-tests from 200 replicates