Table 2.

Correlation coefficients between variables and VIF coefficients

	C	l	$\mathit{\mu }$	$\mathrm{\Delta }\mathit{\sigma }$	VIF
C	1				73.7770
l	0.9931	1			73.7230
$\mathit{\mu }$	−0.5121	−0.4921	1		1.004
$\mathrm{\Delta }\mathit{\sigma }$	0.1416	0.1369	−0.1550	1	1.003