Table 4 Analysis of variance for surface roughness (Ra)

From: Experimental investigation of surface roughness, flank wear, chip morphology and cost estimation during machining of hardened AISI 4340 steel with coated carbide insert

Source	DOF	Seq SS	Adj SS	Adj MS	F	P value	C (%)
v	2	0.042169	0.042169	0.021084	13.37	0.070	21.93
f	2	0.135049	0.135049	0.067524	42.81	0.023	70.22
d	2	0.011942	0.011942	0.005971	3.79	0.209	6.21
Error	2	0.003155	0.003155	0.001577			1.64
Total	8	0.192314					100
	S = 0.0397157		R-Sq = 98.36%		R-Sq(adj) = 93.44%

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