Table 7 ANOVA results of the mathematical model created for EWR.

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

0887699

0.073975

26.52

0.001

Linear

4

0.323038

0.080760

28.95

0.001

I

1

0.248695

0.248695

89.16

0

Ton

1

0.017389

0.017389

6.23

0.055

Toff

1

0.041306

0.041306

14.81

0.012

Dielectric

1

0.004237

0.004237

1.52

0.273

Square

3

0.019525

0.006508

2.33

0.191

I 2

1

0.017089

0.017089

6.13

0.056

Ton2

1

0.000973

0.000973

0.35

0.580

Toff2

1

0.001372

0.001372

0.49

0.514

2-Way interaction

5

0.197684

0.039537

14.17

0.006

I*Ton

1

0.087164

0.087164

31.25

0.003

I*Toff

1

0.110369

0.110369

39.57

0.001

I*Dielectric

1

0.008524

0.008524

3.06

0.141

Ton*Dielectric

1

0.006333

0.006333

2.27

0.192

Toff*Dielectric

1

0.006129

0.006129

2.20

0.198

Error

5

0.013946

0.002789

  

Total

17

0.901645

   
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