Table 5. ANOVA for the Response Surface 2FI Model for Oil Recovery from the POME Model.
| source | sum of squares | DF | mean square | F value | prob > F (p-value) | remarks |
|---|---|---|---|---|---|---|
| model | 165.60 | 6 | 27.60 | 30.55 | <0.0001 | significant |
| XA | 2.66 | 1 | 2.66 | 2.95 | 0.1244 | |
| XB | 3.83 | 1 | 3.83 | 4.24 | 0.0735 | |
| XC | 10.06 | 1 | 10.06 | 11.13 | 0.0103 | significant |
| XAXB | 69.45 | 1 | 69.45 | 76.86 | <0.0001 | significant |
| XAXC | 32.70 | 1 | 32.70 | 36.18 | 0.0003 | significant |
| XBXC | 10.24 | 1 | 10.24 | 11.33 | 0.0098 | significant |
| residual | 7.23 | 8 | 0.90 | |||
| lack of fit | 6.97 | 6 | 1.16 | 8.93 | 0.1041 | insignificant |
| pure error | 0.26 | 2 | 0.13 | |||
| cor total | 172.83 | 14 | ||||
| std. dev | 0.95 | adj R-squared | 0.9268 | |||
| mean | 86.73 | pred R-squared | 0.7092 | |||
| R-squared | 0.9582 | adeq precision | 22.966 |