Table 2.
Analysis of variance for the fitted quadratic polynomial model of polysaccharides yield
|
Source |
Sum of squares |
Degree of freedom |
Mean square |
F-Value |
P-value |
|---|---|---|---|---|---|
| Prob > F | |||||
| Model |
2.94 |
9 |
0.33 |
47.07 |
<0.0001 |
| X1 |
1.30 |
1 |
1.30 |
186.60 |
<0.0001 |
| X2 |
0.61 |
1 |
0.61 |
87.10 |
<0.0001 |
| X3 |
0.49 |
1 |
0.49 |
70.55 |
<0.0001 |
| X1 X2 |
0.026 |
1 |
0.026 |
3.69 |
0.0964 |
| X1 X3 |
2.5×10-3 |
1 |
2.5×10-3 |
0.36 |
0.5674 |
| X2 X3 |
4.0×10-4 |
1 |
4.0×10-4 |
0.058 |
0.8172 |
| X12 |
0.060 |
1 |
0.060 |
8.66 |
0.0216 |
| X22 |
0.088 |
1 |
0.088 |
12.66 |
0.0092 |
| X32 |
0.33 |
1 |
0.33 |
47.36 |
0.0002 |
| Residual |
0.049 |
7 |
6.946×10-3 |
|
|
| Lack of Fit |
0.032 |
3 |
0.011 |
2.54 |
0.1944 |
| Pure Error |
0.017 |
4 |
4.18×10-3 |
|
|
| Cor Total |
2.99 |
16 |
|
|
|
| R2=0.9837 R2adj=0.9628 CV=2.21% | |||||