Table 3.
Analysis of variance.
| Source | Sum of squares | Degrees of freedom | Mean of square | F value | P value |
|---|---|---|---|---|---|
| Yield of extraction | |||||
|
| |||||
| Model | 321.42 | 14 | 22.96 | 10.37 | <0.0001 (significant) |
| Residual | 31.00 | 14 | 2.21 | ||
| Pure error | 1.17 | 4 | 0.29 | ||
| Lack of fit | 29.83 | 10 | 2.98 | 10.24 | 0.0192 |
| Total | 352.41 | 28 | |||
| R 2 | 0.9120 | Adj. R2 | 0.8241 | ||
|
| |||||
| Model equation Y1 = 38.94 − 0.77X1 + 1.48X2 + 3.75X3 − 0.23X4 + 0.19X1X2 − 0.97X1X3 + 1.28X1X4 + 0.36X2X3 − 1.38X2X4 + 0.063X3X4 − 2.81X12 − 1.62X22 − 3.12X32 − 0.73X42 | |||||
|
| |||||
| Total polyphenol content | |||||
|
| |||||
| Model | 423.50 | 14 | 30.25 | 47.38 | <0.0001 (significant) |
| Residual | 8.94 | 14 | 0.64 | ||
| Pure error | 2.49 | 4 | 0.62 | ||
| Lack of fit | 6.45 | 10 | 0.65 | 1.04 | 0.5314 (not significant) |
| Total | 432.42 | 28 | |||
| R 2 | 0.9793 | Adj. R2 | 0.9587 | ||
|
| |||||
| Model equation Y2 = 47.69 + 0.27X1 − 0.42X2 + 2.13X3 − 1.22X4 + 0.62X1X2 − 2.51X1X3 + 0.13X1X4 − 2.90X2X3 − 0.090X2X4 − 3.38X3X4 − 0.75X12 + 0.43X22 − 5.83X32 − 1.73X42 | |||||
|
| |||||
| PTP-1B inhibition rate | |||||
|
| |||||
| Model | 1318.42 | 14 | 94.17 | 9.82 | <0.0001 (significant) |
| Residual | 134.24 | 14 | 4.41 | ||
| Pure error | 31.82 | 4 | 7.95 | ||
| Lack of fit | 102.42 | 10 | 10.24 | 1.29 | 0.4350 (not significant) |
| Total | 1452.66 | 28 | |||
| R 2 | 0.9076 | Adj. R2 | 0.8152 | ||
|
| |||||
| Model equation Y3 = 86.12 − 1.73X1 + 2.89X2 − 2.24X3 + 2.37X4 − 0.13X1X2 + 1.94X1X3 − 2.66X1X4 − 1.44X2X3 + 4.37X2X4 − 5.86X3X4 − 3.95X12 − 2.36X22 − 2.66X32 − 10.86X42 | |||||
|
| |||||
| α-Glucosidase inhibition rate | |||||
|
| |||||
| Model | 1449.06 | 14 | 103.50 | 10.43 | <0.0001 (significant) |
| Residual | 138.87 | 14 | 9.92 | ||
| Pure error | 11.50 | 4 | 2.88 | ||
| Lack of fit | 127.37 | 10 | 12.74 | 4.43 | 0.0822 (not significant) |
| Total | 1587.93 | 28 | |||
| R 2 | 0.9125 | Adj. R2 | 0.8251 | ||
|
| |||||
| Model equation Y4 = 96.63 + 1.04X1 − 2.99X2 − 0.79X3 + 2.06X4 + 10.73X1X2 + 1.50X1X3 − 6.73X1X4 + 0.42X2X3 − 1.70X2X4 + 4.42X3X4 − 0.98X12 − 7.58X22 − 1.73X32 − 4.66X42 | |||||
|
| |||||
| ABTS inhibition rate | |||||
|
| |||||
| Model | 2213.57 | 14 | 158.11 | 33.37 | <0.0001 (significant) |
| Residual | 66.33 | 14 | 4.74 | ||
| Pure error | 8.87 | 4 | 2.22 | ||
| Lack of fit | 57.46 | 10 | 5.75 | 2.59 | 0.1859 (not significant) |
| Total | 2279.90 | 28 | |||
| R 2 | 0.9709 | Adj. R2 | 0.9418 | ||
|
| |||||
| Model equation Y5 = 75.91 + 2.73X1 + 3.70X2 + 4.64X3 − 1.43X4 + 8.08X1X2 + 5.21X1X3 + 4.05X1X4 + 1.48X2X3 + 3.08X2X4 + 6.83X3X4 − 2.12X12 − 11.41X22 − 6.20X32 − 7.65X42 | |||||
Value of lack of fit as analyzed by ANOVA.