Mathematical Modeling of the Bearing Ratio Curve Rmr (50% Rz), through Investigation of the Effect of Process Parameters in Hard Turning of Steel C55 (DIN) with Mixed Ceramics MC2 (Al₂O₃ + TiC)

Table 7

ANOVA analysis.

ANOVA
	df	SS	MS	F	Significance F
Regression	4	396.0140679	99.003517	34.3984233	2.1586E-07
Residual	15	43.17211701	2.87814113	—	—
Total	19	439.186185	—	—	—
	Coefficients	Standard error	t Stat	P-value	Lower 95%	Upper 95%
Intercept	5.272819	2.393102	2.203341	0.043617	0.172044	10.373594
v	−0.004512	0.012094	−0.373094	0.714299	−0.030290	0.021265
f	41.208077	3.914468	10.527120	0.000000	32.864585	49.551569
a	1.398816	2.114688	0.661477	0.518339	−3.108534	5.906167
r	−6.299031	1.208336	−5.212982	0.000105	−8.874538	−3.723525