A New Robust Diagnostic Plot for Classifying Good and Bad High Leverage Points in a Multiple Linear Regression Model

Table 8

The regression estimates, standard errors (in the brackets), and PCE for Phosphorus data set.

Variables	Original data		Regular data
			⁢Remove suspect observations; detected by OLS-MD plot; case		⁢Remove suspect GLP and BLP; detected by both MGt-DRGP; and LMS-RMD plots; cases , , , and		⁢Remove only the suspect BLP; detected by MGt-DRGP and; LMS-RMD plots; cases ,
	Estimate	SE	Estimate	SE	Estimate	SE	Estimate	SE
Inorg.	1.790	0.557	−1.290	0.343	1.720	0.505	1.211	0.285
Organic	0.087	0.415	−0.111	0.249	−0.394	0.440	0.088	0.218
Constant	56.251	16.311	66.465	9.850	72.230	12.117	60.910	8.398