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Table 5 ANOVA for response surface in 2-factor interaction (2FI) model

From: New lipase-producing Streptomyces isolated from halo-alkaline habitat in Wadi El Natrun: polyphasic identification and statistical optimization of enzyme production

Source Sum of squares df Mean square F value p value Prob > F  
Model 374.55 6 62.43 7.02 0.0074 Significant
A: Starch conc. 018.60 1 18.60 2.09 0.1860  
B: Linseed oil conc. 024.15 1 24.15 2.72 0.1379  
C: Tween-80 conc. 004.65 1 04.65 00.52 0.4901  
AB 238.70 1 238.70 26.85 0.0008  
AC 036.60 1 036.60 04.12 0.0770  
BC 051.84 1 051.84 05.83 0.0422  
Residual 071.12 8 008.89    
Lack of fit 068.70 6 011.45 09.46 0.0986 Not significant
Pure error 002.42 2 001.21   
Design specifications
 Std. Dev. 02.980 R2 (correlation coefficient) 0.8404
 Mean 17.270 Adj R2 0.7207
 C.V. % 17.270 Adeq precision 9.2910
 PRESS 265.65   
  1. Adj adjusted, Adeq adequate signal
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