Calculation of a Health Index of Oil-Paper Transformers Insulation with Binary Logistic Regression

Table 9

Classification table with four factors.

Actual group	Predicted		Actual group size	Percentage correctly classified
	0	1
0 (health)	20	1	21	95.2%
1 (unhealthy)	1	8	9	88.9%
Predicted group size	21	9	30	93.3%