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Table 3 ANOVA for quadratic model. Response 1: yield

From: Optimization of inulin production process parameters using response surface methodology

Basis Sum of squares Degree of freedom Mean square F value p value Significance
Quadratic model 16.78 9 1.86 12.97 0.0014 Significant
A-Temperature 0.0378 1 0.0378 0.2630 0.6239  
B-Creep speed 0.0171 1 0.0171 0.1190 0.7402  
C-Pressure 2.74 1 2.74 19.04 0.0033  
AB 0.3481 1 0.3481 2.42 0.1637  
AC 0.0992 1 0.0992 0.6901 0.4336  
BC 0.2970 1 0.2970 2.07 0.1938  
A2 2.68 1 2.68 18.67 0.0035  
B2 3.44 1 3.44 23.90 0.0018  
C2 5.77 1 5.77 40.15 0.0004  
Residual 1.01 7 0.1438    
Lack of fit 0.3369 3 0.1123 0.6707 0.6132 Not significant
Pure error 0.6697 4 0.1674    
Cor total 17.79 16     
  1. A, B, and C are the temperature, creep speed, and pressure respectively