Source of variation

Sum of squares

Freedom degree

Middle square

Ratio

Significance

Regression

1602.76

5

320.553

464.4344

***

Residue

81.3053

7

11.615

Validity

78.5445

3

26.1815

37.9332

**

Error

2.76

4

0.6902

total

1684.0653

12