Electronic Journal of Biotechnology ISSN: 0717-3458
  © 2007 by Universidad Católica de Valparaíso -- Chile
Vol. 10 No. 4, Issue of October 15, 2007
 


Table 4. Analysis of variance and regression analyses for the response of the 24 central composite design.


Source of variation

Sum of squares

Degrees of freedom

Mean squares

Ftesta

p-value

 Regression

2.4883

9

0.2765

14.2

<0.00001

 Residual

0.3310

17

0.0195

 

 

 Lack of fit

0.2733

15

0.0182

 

 

 Pure error

0.0577

2

0.0288

 

 

 Total

2.8193

 

 

 

 

Coefficient of determination: R2 = 0.88
aF0.95;9;17 = 2.49