Table 4. Partial regression coefficients B, β coefficients, standard error of the mean SEM and significance for estimated variables of M2.

Variable	B	SEM	β	t	sig
constant	7.549	.328		22.986	.000
APT	.080	.021	0.574	3.757	.001
VHF	-.001	.001	-0.419	-2.530	.021
TVPmin	-.013	.006	-0.321	-1.958	.066