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Journal of Materials Science: Materials in Engineering

Table 7 ANOVA results for the dimensionless model by stepwise regression

From: Investigation of a new methodology for the prediction of drawing force in deep drawing process with respect to dimensionless analysis

Source

Sum of squares

Degree of freedom

Mean square

F value

P value

% contribution

Model

0.956

10

0.0956

7.468

0.008

 

π2

0.412

2

0.206

16.093

0.0102

32.07

π3

0.312

2

0.156

12.187

0.0145

24.28

π4

0.227

2

0.113

8.828

0.0175

17.61

π5

0.036

2

0.018

1.406

0.346

2.81

π6

0.246

2

0.123

9.6093

0.0135

19.15

Lack of fit

0.066

5

0.0132

1.031

0.495

2.05

  1. R2 = 0.91, R2adj = 0.93, R2pred = 0.92
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