Table 7 Regression analysis for the production of β-glucosidase enzyme from B. subtilis RA10 for quadratic response surface model fitting (ANOVA)
Source | Sum of squares | df | Mean square | F value | P value Prob > F | |
|---|---|---|---|---|---|---|
Model | 1311.03 | 14 | 93.64 | 170.69 | < 0.0001 | Significant |
A paddy straw | 117.65 | 1 | 117.65 | 214.45 | < 0.0001 | |
B beef extract | 338.07 | 1 | 338.07 | 616.22 | < 0.0001 | |
C PEG 6000 | 3.57 | 1 | 3.57 | 6.507 | 0.0254 | |
D NaNO3 | 277.96 | 1 | 277.96 | 506.65 | < 0.0001 | |
AB | 11.24 | 1 | 11.24 | 20.48 | 0.0007 | |
AC | 103.34 | 1 | 103.34 | 188.36 | < 0.0001 | |
AD | 1.00 | 1 | 1.00 | 1.82 | 0.2019 | |
BC | 0.00 | 1 | 0.00 | 0 | 1.0000 | |
BD | 5.10 | 1 | 5.10 | 9.28 | 0.0101 | |
CD | 3.25 | 1 | 3.25 | 5.92 | 0.0315 | |
A 2 | 31.86 | 1 | 31.86 | 58.06 | < 0.0001 | |
B 2 | 35.85 | 1 | 35.85 | 65.34 | < 0.0001 | |
C 2 | 60.89 | 1 | 60.89 | 110.99 | < 0.0001 | |
D 2 | 175.65 | 1 | 175.65 | 320.17 | < 0.0001 | |
Residual | 6.58 | 12 | 0.548615 | |||
Lack of fit | 6.58 | 10 | 0.658337 | 0.08 | Not significant | |
Pure error | 0.00 | 2 | 0 |