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Table 5 ANOVA results of the Box–Behnken design

From: Novel optimization strategy for tannase production through a modified solid-state fermentation system

Source Sum of squares Degree of freedom Mean square F value P value
P > F
Model 310.99 14 22.21 45.43 < 0.0001
A 29.31 1 29.31 59.95 < 0.0001
B 159.67 1 159.67 326.56 < 0.0001
C 1.752E−003 1 1.752E−003 3.583E−003 0.9531
D 28.23 1 28.23 57.73 < 0.0001
AB 4.05 1 4.05 8.28 0.0122
AC 0.83 1 0.83 1.70 0.2129
AD 0.96 1 0.96 1.96 0.1828
BC 0.15 1 0.15 0.31 0.5858
BD 0.28 1 0.28 0.56 0.4652
CD 0.096 1 0.096 0.20 0.6643
A 2 42.89 1 42.89 87.72 < 0.0001
B 2 53.45 1 53.45 109.31 < 0.0001
C 2 16.29 1 16.29 33.32 < 0.0001
D 2 16.31 1 16.31 33.36 < 0.0001
Residual 6.85 14 0.49   
Lack of fit 6.21 10 0.62 3.93 0.0994
Pure error 0.63 4 0.16   
Cor total 317.84 28    
Std. dev. 0.70 R 2 0.9785   
Mean 9.81 Adj R2 0.9569   
C.V. (%) 7.13 Pred R2 0.8843   
PRESS 36.78 Adeq precision 21.227