Table 5 ANOVA results of the mathematical model created for MRR.

From: Parametric optimization of graphite powder-mixed electrical discharge machining of Ni-Cr dental alloy by response surface methodology

Source

Degree of freedom

Adjusted sum of squares

Adjusted mean squares

F-value

P-value

Model

12

174.606

14.550

29.16

0.001

Linear

4

137.739

34.435

69.02

0

I

1

122.305

122.305

245.14

0

Ton

1

8.789

8.789

17.62

0.009

Toff

1

0.178

0.178

0.36

0.576

Dielectric

1

9.265

9.265

18.57

0.008

Square

3

2.209

0.736

1.48

0.328

I 2

1

2.176

2.176

4.36

0.091

Ton2

1

0.016

0.016

0.03

0.865

Toff2

1

0.019

0.019

0.04

0.853

2-Way interaction

5

15.773

3.155

6.32

0.032

I*Ton

1

9.238

9.238

18.52

0.008

I*Toff

1

1.269

1.269

2.54

0.172

I*Dielectric

1

4.301

4.301

8.62

0.032

Ton *Dielectric

1

1.638

1.638

3.28

0.130

Toff *Dielectric

1

0.003

0.003

0.01

0.940

Error

5

2.495

0.499

  

Total

17

177.1