Optimization of Cryogenic Process Parameters for the Minimization of Surface Residual Stress in Pure Iron Using Taguchi Design

Table 5

Analysis of variance for feeding residual stress model.

Source	Regression	Residual error	Total
Df	4	4	8
Sum of squares	0.14544	0.01547	0.16091
Mean square	0.03636	0.00387
F value	9.39923
Prob > F	0.02596
Remarks	Significant