[Retracted] Optimization of CNC End Milling Process Parameters of Low-Carbon Mold Steel Using Response Surface Methodology and Grey Relational Analysis

Table 6

Material removal rate (MRR)—analysis of variance.

Response surface linear model
Analysis of variance table
Source	Sum of squares	df	Mean square	F-value	value
Model	2.99759928	4	0.74939982	668091.1902	<0.0001	Significant
A	0.041067	1	0.041067	1034328.952	<0.0001
B	2.857728	1	2.857728	749879.2755	<0.0001
C	0.019683	1	0.019683	430180.4257	<0.0001
D	0.07912128	1	0.07912128	636600.00	<0.0001
Residual error	1.87633	24	0
Lack of fit	0	20	0
Pure error	0	4	0
Cor total	2.99759928	28
Standard deviation	0.000697911		R^2	0.98768975
Mean	0.54264		Adj R^2	0.98524754
CV (%)	0.073328765		Pred R^2	NA
PRESS	NA		Adequate precision	2152.502951