Source

Sum of Squares

df

Mean Square

F Value

p-value Prob > F

Significance

Model

9316.67

14

665.48

32.75

<0.0001

significant

X₁

1066.72

1

1066.72

52.49

<0.0001

X₂

3704.81

1

3704.81

182.30

<0.0001

X₃

3396.63

1

3396.63

167.14

<0.0001

X₄

409.97

1

409.97

20.17

0.0005

X₁X₂

10.53

1

10.53

0.52

0.4835

X₁X₃

511.66

1

511.66

25.18

0.0002

X₁X₄

1.27

1

1.27

0.06

0.8066

X₂X₃

5.83

1

5.83

0.29

0.6006

X₂X₄

29.32

1

29.32

1.44

0.2496

X₃X₄

30.25

1

30.25

1.49

0.2426

X₁²

0.08

1

0.08

0.00

0.9505

X₂²

21.30

1

21.30

1.05

0.3234

X₃²

101.88

1

101.88

5.01

0.0419

X₄²

6.41

1

6.41

0.32

0.5832

Residual

284.51

14

20.32

Lack of Fit

241.01

10

24.10

2.22

0.2304

not significant

Pure Error

43.50

4

10.88

Cor Total

9601.19

28