Interaction of Transformer Oil Parameters on Each Other and on Transformer Health Index Using Curve Estimation Regression Method

Table 9

Comparison of two regression methods to predict the relationship between furfural and CO parameters of the transformer.

Equation	Model summary					Parameter estimates
	R-Square	F	df1	df2	Sig	Constant	b1	b2	b3
Inverse	0.047	5.876	1	118	0.017	0.423	−16.118	—	—
Cubic	0.622	63.719	3	116	0	0.002	0.002	−5.126E − 6	3.591E − 9

Dependent variable: furfural; independent variable: CO.