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Table 4 Analysis of variance table for RSM-CCD

From: A statistical strategy for optimizing the production of α-galactosidase by a newly isolated Aspergillus niger NRC114 and assessing its efficacy in improving soymilk properties

Source Sum of squares df Mean square F-value p-value (prob > F)
Model 581.1992 14 41.51423 13.11533 < 0.0001
A—pH value 33.51662 1 33.51662 10.5887 0.0053
B—Mannose conc. 134.8032 1 134.8032 42.58754 < 0.0001
C—Meat extract conc. 119.2925 1 119.2925 37.68734 < 0.0001
D—Incubation time 183.5619 1 183.5619 57.99156 < 0.0001
AB 1.352597 1 1.352597 0.427317 0.5232
AC 5.675014 1 5.675014 1.792872 0.2005
AD 13.98608 1 13.98608 4.418535 0.0529
BC 14.70656 1 14.70656 4.646151 0.0478
BD 28.32565 1 28.32565 8.948746 0.0091
CD 25.02249 1 25.02249 7.905199 0.0131
A2 5.970958 1 5.970958 1.886368 0.1898
B2 1.022902 1 1.022902 0.323159 0.5781
C2 17.43682 1 17.43682 5.508706 0.0331
D2 0.643106 1 0.643106 0.203172 0.6586
Residual 47.47981 15 3.16532   
Lack of fit 45.21154 10 4.521154 9.966101 0.0102
Pure error 2.268266 5 0.453653   
Cor total 628.6791 29    
  1. Std. dev., 1.78; R-squared, 0.924; adj R-squared, 0.854; C.V.%, 11.932; adeq precision, 14.014