Research on NOFRF Entropy-Based Detection Method for Early Damage of Pillar Porcelain Insulator

Table 8

Analysis of variance.

Sources of variance	Degrees of freedom	Deviation sum of squares	Mean sum of square	F-crit	Probability value
A	2	0.000869	0.000435	1.30	0.434
B	2	0.084707	0.042353	126.85	0.008
C	2	0.007129	0.003565	10.68	0.086
Error	2	0.000668	0.000334
Summation	8	0.093373