Analysis of Variance^[A]

Model

Sum of squares

Df

Mean square

F

Significance

1

Regression

19,170.934

7

2738.705

2.298

0.098^B

Residual error

14,303.626

12

1191.969

Total

33,474.560

19

2

Regression

19,138.432

6

3189.739

2.892

0.051^C

Residual error

14,336.128

13

1102.779

Total

33,474.560

19

3

Regression

18,940.286

5

3788.057

3.649

0.025^D

Residual error

14,534.274

14

1038.162

Total

33,474.560

19

4

Regression

18,439.147

4

4609.787

4.599

0.013^E

Residual error

15,035.413

15

1002.361

Total

33,474.560

19

5

Regression

17,809.090

3

5936.363

6.063

0.006^F

Residual error

15,665.470

16

979.092

33,474.560

19