Table 3 Analyze of mean square in the regression model.
Source | SS | D F | MS | F-value | P-value |
|---|---|---|---|---|---|
Model | 3.98 | 14 | 0.28 | 53.22 | < 0.0001 |
A-ethanol concentration | 3.008 × 10− 3 | 1 | 3.008 × 10− 3 | 0.56 | 0.4651 |
B-material-to-liquid ratio | 0.15 | 1 | 0.15 | 28.05 | 0.0001 |
C-ultrasound power | 2.408 × 10− 3 | 1 | 2.408 × 10− 3 | 0.45 | 0.5126 |
D-temperature | 8.333 × 10− 4 | 1 | 8.333 × 10− 4 | 0.16 | 0.6986 |
AB | 0.032 | 1 | 0.032 | 6.07 | 0.0273 |
AC | 3.600 × 10− 3 | 1 | 3.600 × 10− 4 | 0.67 | 0.4252 |
AD | 6.250 × 10− 4 | 1 | 6.250 × 10− 4 | 0.12 | 0.7372 |
BC | 0.014 | 1 | 0.014 | 2.70 | 0.1227 |
BD | 9.000 × 10− 4 | 1 | 9.000 × 10− 4 | 0.17 | 0.6875 |
CD | 0.011 | 1 | 0.011 | 2.07 | 0.1726 |
A2 | 3.07 | 1 | 3.07 | 574.77 | < 0.0001 |
B2 | 0.65 | 1 | 0.65 | 121.66 | < 0.0001 |
C2 | 0.86 | 1 | 0.86 | 162.04 | < 0.0001 |
D2 | 0.76 | 1 | 0.76 | 141.65 | < 0.0001 |
Error | 0.075 | 14 | 5.335 × 10− 3 | ||
Lack of fit | 0.058 | 10 | 5.797 × 10− 3 | 1.39 | 0.4031 |
Pure error | 0.017 | 4 | 4.180 × 10− 3 | ||
Total | 4.05 | 28 | |||
R2 = 0.9816 | R2Adj = 0.9631 |
