| Source of variance |
Sum of squares |
Degrees of freedom |
Mean square |
F value |
P value |
| X1 |
10.81 |
1 |
10.81 |
0.14 |
0.7195 |
| X2 |
184.32 |
1 |
184.32 |
2.38 |
0.1665 |
| X3 |
646.20 |
1 |
646.20 |
8.36 |
0.0233 |
| X1X2 |
32.49 |
1 |
32.49 |
0.42 |
0.5375 |
| X1X3 |
18.06 |
1 |
18.06 |
0.23 |
0.6436 |
| X2X3 |
118.81 |
1 |
118.81 |
1.54 |
0.2551 |
| X12 |
2359.53 |
1 |
2359.53 |
30.52 |
0.0009 |
| X22 |
2956.28 |
1 |
2956.28 |
38.23 |
0.0005 |
| X32 |
719.54 |
1 |
719.54 |
9.31 |
0.0186 |
| Model |
7685.36 |
9 |
853.93 |
11.04 |
0.0023 |
| Residual |
541.24 |
7 |
77.32 |
|
|
| Pure error |
331.65 |
4 |
82.91 |
|
|
| Lack of fit |
209.59 |
3 |
69.86 |
0.84 |
0.5375 |
| Total variation |
8226.60 |
16 |
|
|
|
|
