Table 8.
Analysis of variance for triterpenoids extraction from Swertia chirata using central composite design criterion
| Source | df | Seq SS | Adj SS | Adj MS | F | P |
|---|---|---|---|---|---|---|
| Regression | 9 | 5.39781 | 5.39781 | 0.59976 | 46.97 | 0.000 |
| Linear | 3 | 3.49235 | 3.49235 | 1.16412 | 91.17 | 0.000 |
| Square | 3 | 1.71326 | 1.71326 | 0.57109 | 44.73 | 0.000 |
| Interaction | 3 | 0.19220 | 0.19220 | 0.06407 | 5.02 | 0.022 |
| Residual error | 10 | 0.12769 | 0.12769 | |||
| Lack of fit | 5 | 0.10635 | 0.01277 | 0.02127 | 4.99 | 0.051 |
| Pure error | 5 | 0.02133 | 0.10635 | 0.00427 | ||
| Total | 19 | 5.52550 | 0.02133 |
R-Sq = 97.69% R-Sq(pred) = 84.79% R-Sq(adj) = 95.61%