Table 6 Analysis of variance.

From: Analytical design and test of a clip-based precision corn seed metering device using DEM-MBD coupling

Source

Qualified rate

Multiple rate

Leakage rate

Sum of squares

Degree of freedom

F

P

Sum of squares

Degree of freedom

F

P

Sum of squares

Degree of freedom

F

P

Model

83

9

371.56

< 0.0001

37.14

9

128.99

< 0.0001

12.15

9

118.13

< 0.0001

X1

0.8256

1

33.26

0.0007

0.6498

1

20.31

0.0028

0.0105

1

0.9199

0.3694

X2

1.83

1

73.87

< 0.0001

2.54

1

79.47

< 0.0001

0.0578

1

5.06

0.0593

X3

0.5724

1

23.06

0.002

2.32

1

72.58

< 0.0001

0.5886

1

51.51

0.0002

X1 × 2

0.2916

1

11.75

0.011

0.1482

1

4.63

0.0684

0.024

1

2.1

0.1904

X1 × 3

0.6972

1

28.09

0.0011

0.57

1

17.82

0.0039

0.0064

1

0.56

0.4786

X2 × 3

0.0002

1

0.0091

0.9268

0.0064

1

0.2

0.6682

0.009

1

0.7897

0.4037

X12

32.09

1

1292.7

< 0.0001

13.81

1

431.63

< 0.0001

3.8

1

332.17

< 0.0001

X22

22.38

1

901.68

< 0.0001

9.9

1

309.49

< 0.0001

2.51

1

219.59

< 0.0001

X32

16.22

1

653.68

< 0.0001

4.16

1

129.9

< 0.0001

3.96

1

346.31

< 0.0001

Residual

0.1737

7

  

0.224

7

  

0.08

7

  

Lack of fit

0.1218

3

3.13

0.1497

0.1069

3

1.22

0.4118

0.0067

3

0.1214

0.9428

Pure error

0.0519

4

  

0.1171

4

  

0.0733

4

  

Total

83.18

16

  

37.36

16

  

12.23

16

  
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