Table 2 Variance analysis of regression equations.
Source of variation | Sum of squares | Variance | Mean sum of square | F | P |
|---|---|---|---|---|---|
Model | 5.53 | 9 | 0.61 | 1900.39 | <0.0001 |
A-ethanol concentration | 5.941E-003 | 1 | 5.941E-003 | 18.37 | 0.0036 |
B-ultrasonic time | 3.081E-003 | 1 | 3.081E-003 | 9.53 | 0.0176 |
C-ultrasonic temperature | 2.080E-003 | 1 | 2.080E-003 | 6.43 | 0.0389 |
AB | 4.830E-003 | 1 | 4.830E-003 | 14.94 | 0.0062 |
AC | 4.622E-004 | 1 | 4.622E-004 | 1.43 | 0.2707 |
BC | 0.013 | 1 | 0.013 | 39.50 | 0.0004 |
A2 | 1.72 | 1 | 1.72 | 5307.11 | <0.0001 |
B2 | 1.37 | 1 | 1.37 | 4240.37 | <0.0001 |
C2 | 1.84 | 1 | 1.84 | 5683.52 | <0.0001 |
Residual | 2.263E-003 | 7 | 3.233E-004 | ||
Lack of fit | 1.446E-003 | 3 | 4.821E-004 | 2.36 | 0.2125 |
Error | 8.168E-004 | 4 | 2.042E-004 | ||
Total dispersion | 5.53 | 16 |
