Models	OL		WBST		IL
No. of Class Statistics	One-class model	Two-class model	One-class model	Two-class model	One-class model	Two-class model
$\bar{x}$	0.357	0.267	0.635	0.277	0.634	0.296
S	0.510	0.397	0.825	0.477	0.622	0.531
N	643	643	643	643	643	643
$S_{y}$	0.025		0.037		0.032
$Z_{d}$	3.60		9.67		10.56