Source of variation

SS*

DF

MS**

F - value

p – value

Regression

0.50

5

0.10

60.0

<0.01

Residues

0.01

5

0.02

-

-

Total

0.51

10

-

-

-

Lack of fit

0.006

3

0.002

1.6

0.42

Pure error

0.002

2

0.001

-

-

% of explained variation: 98.6

% of maximum explained variation: 99.6

* SS: sum of squares ** MS: mean of squares. F - tabulated = 5.05 for a confidence level of 95 %, 5 DF of the regression and 5 DF of the residues.
Table 7: Analysis of variance (ANOVA) and variation values of the proposed quadratic model.