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Table 4

Analysis of variance (ANOVA) of the fitted quadratic polynomial model for Y.

Source DFa Seq. SSb Adj. SSc Adj. MSd F-value p-valuee
Regression 9 113.462 113.462 12.6069 62.02 0.000
Linear 3 93.516 93.516 31.1721 247.07 0.000
Square 3 15.536 15.536 5.1785 25.48 0.000
Interaction 3 4.410 4.410 1.4700 7.23 0.007
Residual error 10 2.033 2.033 2.033
Lack of fit 5 1.304 1.304 0.2607 1.79 0.270
Pure error 5 0.729 0.729 0.1458
Total 19 115.495
a

Degree of freedom;

b

Sequential sums of squares;

c

Adjusted sum of squares;

d

Adjusted mean squares;

e

p-value < 0.001 highly significant; 0.001 ≤ p-value < 0.05 significant; p-value ≥ 0.05 not significant.

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