Table 4.
ANOVA statistics of the quadratic model for the extraction yields of tryptanthrin, indigo and indirubin.
| Variables | Tryptanthrin | F-Value | p-Value | Indigo | F-Value | p-Value | Indirubin | F-Value | p-Value |
|---|---|---|---|---|---|---|---|---|---|
| Mean Square | Mean Square | Mean Square | |||||||
| Model | 6.94 × 10−4 | 22.76 | 0.0002 | 0.35 | 13.97 | 0.0011 | 2.02 × 10−3 | 5.71 | 0.0158 |
| A | 1.71 × 10−4 | 5.61 | 0.0497 | 0.031 | 1.23 | 0.3039 | 1.45 × 10−4 | 0.41 | 0.5428 |
| B | 5.51 × 10−5 | 1.81 | 0.2208 | 1.87 | 74.27 | <0.0001 | 1.92 × 10−3 | 5.44 | 0.0524 |
| C | 5.62 × 10−3 | 184.15 | <0.0001 | 0.073 | 2.91 | 0.1317 | 0.011 | 31.43 | 0.0008 |
| AB | 3.60 × 10−5 | 1.18 | 0.3133 | 1.76 × 10−3 | 0.070 | 0.7989 | 9.00 × 10−6 | 0.025 | 0.8777 |
| AC | 6.25 × 10−6 | 0.20 | 0.6645 | 1.44 × 10−4 | 5.72 × 10−3 | 0.9418 | 1.60 × 10−5 | 0.045 | 0.8375 |
| BC | 2.40 × 10−4 | 7.88 | 0.0263 | 0.099 | 3.92 | 0.0883 | 1.44 × 10−3 | 4.09 | 0.0829 |
| A2 | 1.15 × 10−5 | 0.38 | 0.5593 | 0.074 | 2.92 | 0.1311 | 2.24 × 10−3 | 6.33 | 0.0400 |
| B2 | 3.04 × 10−6 | 0.100 | 0.7614 | 0.090 | 3.57 | 0.1006 | 1.54 × 10−4 | 0.44 | 0.5300 |
| C2 | 1.10 × 10−4 | 3.59 | 0.100 | 0.85 | 33.89 | 0.0006 | 8.31 × 10−4 | 2.35 | 0.1689 |
| Lack of Fit | 4.56 × 10−5 | 2.37 | 0.2111 | 0.030 | 1.41 | 0.3628 | 6.78 × 10−4 | 6.21 | 0.0551 |
| R2 | 0.967 | 0.9473 | 0.8800 |