Table 6 ANOVA of the reduced quadratic model of oil yield from WO-RP
Source | Sum of squares | df | Mean square | F value | p-value |
|---|---|---|---|---|---|
Prob > F | |||||
Model | 131.77 | 7 | 18.82 | 48.23 | \(< 0.0001^{\text{a}}\) |
A—methanol–oil ratio | 26.78 | 1 | 26.78 | 68.62 | \(< 0.0001^{\text{a}}\) |
B—catalyst loading | 77.18 | 1 | 77.18 | 197.75 | \(< 0.0001^{\text{a}}\) |
C—reaction time | 0.96 | 1 | 0.96 | 2.46 | \(0.1427^{\text{b}}\) |
AC | 6.59 | 1 | 6.59 | 16.88 | \(0.0014^{\text{a}}\) |
BC | 5.85 | 1 | 5.85 | 14.98 | \(0.0022^{\text{a}}\) |
\(A^{2}\) | 10.58 | 1 | 10.58 | 27.11 | \(0.0002^{\text{a}}\) |
\(B^{2}\) | 6.26 | 1 | 6.26 | 16.04 | \(0.0017^{\text{a}}\) |
Residual | 4.68 | 12 | 0.39 | ||
Lack of fit | 1.34 | 7 | 0.19 | 0.29 | \(0.9327^{\text{b}}\) |
\(R^{2} = 0.9657\) |