International Journal of Polymer Science / 2013 / Article / Tab 4

Research Article

Application of Box-Behnken Design in Optimization of Glucose Production from Oil Palm Empty Fruit Bunch Cellulose

Table 4

Analysis of variance in the regression model for optimisation of glucose production from OPEFB cellulose.

Source of variationsDegree of freedomSum of squareMean square valueDetermination coefficient ( )

Regression819264240.7531.14**0.9765
Residual6464.0477.34
Pure error1419728.04170.72
Linear311072.003690.6747.72**
Quadratic22868.571434.2918.55**
Cross-product35323.121774.3722.94**
Lack of fit172.0072.000.92
Total error5392.3578.47

(8,6) = 4.15; (8,6) = 8.10; (3,5) = 5.41; (3,5) = 12.06; (2,5) = 5.79; (2,5) = 13.27; (1,5) = 6.61; (1,5) = 16.26.
**Significant at 1% level.

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