Table 6 Analysis of variance for MRR (before elimination)

Model

2520.93

20

126.05

71.03

<0.0001

Significant

A

2134.51

1

2134.51

1202.89

<0.0001

B

250.15

1

250.15

140.97

<0.0001

C

3.75

1

3.75

2.11

0.1584

D

5.62

1

5.62

3.17

0.0873

E

1.05

1

1.05

0.59

0.4493

A²

4.26 × 10^-03

1

4.26 × 10^-03

2.40 × 10^-03

0.9613

B²

7.58

1

7.58

4.27

0.0493

C²

4.99

1

4.99

2.81

0.1059

D²

19.52

1

19.52

11

0.0028

E²

12.23

1

12.23

6.89

0.0146

AB

59.27

1

59.27

33.4

<0.0001

AC

0.17

1

0.17

0.095

0.7605

AD

0.62

1

0.62

0.35

0.5602

AE

0.89

1

0.89

0.5

0.486

BC

4.51

1

4.51

2.54

0.1233

BD

0.7

1

0.7

0.39

0.5362

BE

3.33

1

3.33

1.88

0.1829

CD

0.81

1

0.81

0.46

0.5045

CE

0.81

1

0.81

0.46

0.5045

DE

0.19

1

0.19

0.1

0.749

Residual

44.36

25

1.77

Lack of Fit

40.85

20

2.04

2.91

0.1199

Not significant

Pure Error

3.51

5

0.7

Cor Total

2565.29

45