Table 3.
Analysis of variance for the fitted quadratic polynomial model of hydroxyl radical scavenging activity of polysaccharides
|
Source |
Sum of squares |
Degree of freedom |
Mean square |
F-Value |
P-value |
|---|---|---|---|---|---|
| Prob > F | |||||
| Model |
1154.38 |
9 |
128.26 |
38.82 |
<0.0001 |
| X1 |
641.89 |
1 |
641.89 |
191.75 |
<0.0001 |
| X2 |
36.51 |
1 |
36.51 |
10.91 |
0.0131 |
| X3 |
306.16 |
1 |
306.16 |
91.46 |
<0.0001 |
| X1 X2 |
100.50 |
1 |
100.50 |
30.02 |
0.0009 |
| X1 X3 |
3.33 |
1 |
3.33 |
0.99 |
0.3518 |
| X2 X3 |
0.20 |
1 |
0.20 |
0.060 |
0.8128 |
| X12 |
1.78 |
1 |
1.78 |
0.53 |
0.4897 |
| X22 |
52.24 |
1 |
52.24 |
15.61 |
0.0055 |
| X32 |
10.35 |
1 |
10.35 |
3.09 |
0.1222 |
| Residual |
23.43 |
7 |
3.35 |
|
|
| Lack of Fit |
16.86 |
3 |
5.62 |
3.42 |
0.1328 |
| Pure Error |
6.57 |
4 |
1.64 |
|
|
| Cor Total |
1177.82 |
16 |
|
|
|
| R2=0.9801 R2adj=0.9545 CV=3.79% | |||||