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

Table 3

Comparison of five regression methods to predict the relationship between furfural and water components of the transformer.

Equation	Model summary					Parameter estimates
	R-Square	F	df1	df2	Sig	Constant	b1
Compound	0.069	8.691	1	118	0.004	0.249	0.976
Power	0.036	4.451	1	118	0.037	0.277	-0.189
Growth	0.069	8.691	1	118	0.004	−1.390	−0.025
Exponential	0.069	8.691	1	118	0.004	0.249	−0.025
Logistic	0.069	8.691	1	118	0.004	4.015	1.025

Dependent variable: furfural; independent variable: water.