[Retracted] Optimization of Process Parameters for Friction Stir Welding of Different Aluminum Alloys AA2618 to AA5086 by Taguchi Method

Table 8

Statistical ANOVA for the correlation between signal and noise.

Source	Degrees of freedom	Sequential sum of squares	Adjusted mean square	Fisher ratio	Contribution percentage
A	3	21.28	7.6829	0.51	13.142
B	3	19.81	6.91284	0.39	9.9582
C	3	6.82	2.4283	0.41	4.186124
D	3	128.546	41.2838	7.16	69.5428
Residual error	3	11.812	3.9426		5.4823
Total	15	201.428			100