Optimization of Polygalacturonase Production from a Newly Isolated Thalassospira frigidphilosprofundus to Use in Pectin Hydrolysis: Statistical Approach
Table 7
Analysis of variance for quadratic model.
Source
df
Seq SS
Adj SS
MS
F value
Prob. (P) > F
Regression
14
159.379
159.3789
11.3842
16.45
0.000
Linear
4
53.139
53.1393
13.2848
19.20
0.000
Square
4
86.477
86.4770
21.6193
31.25
0.000
Interaction
6
19.763
19.7626
3.2938
4.76
0.007
Residual error
15
10.378
10.3782
0.6919
Lack of fit
10
9.465
9.4649
0.9465
5.18
0.042
Pure error
5
0.913
0.9133
0.1827
Total
29
169.757
S = 0.8318, R-Sq = 93.90%, and R-Sq (adj) = 88.20%. SS: sum of squares, MS: mean of squares, and df: degree of freedom.