Table 2.
Adequecy of model tested.
| Source | Sum of squares | df | Mean square | F Value | Prob > F | Remarks |
|---|---|---|---|---|---|---|
| Sequential model sum of squares for acidified methanolic extraction | ||||||
| Mean versus Total | 20893255.04 | 1 | 20893255.04 | |||
| Linear versus Mean | 128877.78 | 3 | 42959.26 | 20.25 | <0.0001 | |
| 2FI versus Linear | 10748.42 | 3 | 3582.81 | 2.13 | 0.1600 | |
| Quadratic versus 2FI | 12433.06 | 3 | 4144.35 | 6.60 | 0.0189 | Suggested |
| Cubic versus Quadratic | 874.80 | 3 | 291.60 | 0.33 | 0.8045 | Aliased |
| Residual | 3520.73 | 4 | 880.18 | |||
| Total | 21049709.83 | 17 | 1238218.23 | |||
|
| ||||||
| Sequential model sum of squares for acidified ethanolic extraction | ||||||
| Mean versus Total | 7196887.80 | 1 | 7196887.80 | |||
| Linear versus Mean | 147605.80 | 3 | 49201.93 | 28.80 | <0.0001 | Suggested |
| 2FI versus Linear | 532.96 | 3 | 177.65 | 0.08 | 0.9683 | |
| Quadratic versus 2FI | 13908.91 | 3 | 4636.30 | 4.18 | 0.0544 | Suggested |
| Cubic versus Quadratic | 6069.16 | 3 | 2023.05 | 4.76 | 0.0829 | Aliased |
| Residual | 1699.43 | 4 | 424.86 | |||
| Total | 7366704.07 | 17 | 433335.53 | |||
|
| ||||||
| Source | Std. Dev. | R 2 | Adjusted R 2 | Predicted R 2 | PRESS | Remarks |
|
| ||||||
| Model summary statistics for acidified methanolic extraction | ||||||
| Linear | 46.058 | 0.824 | 0.783 | 0.654 | 54157.757 | |
| 2FI | 41.023 | 0.892 | 0.828 | 0.542 | 71629.308 | |
| Quadratic | 25.059 | 0.972 | 0.936 | 0.875 | 19498.004 | Suggested |
| Cubic | 29.668 | 0.977 | 0.910 | + | Aliased | |
|
| ||||||
| Model summary statistics for acidified ethanolic extraction | ||||||
| Linear | 41.334 | 0.869 | 0.839 | 0.741 | 43972.027 | Suggested |
| 2FI | 46.559 | 0.872 | 0.796 | 0.406 | 100897.766 | |
| Quadratic | 33.314 | 0.954 | 0.895 | 0.413 | 99761.992 | Suggested |
| Cubic | 20.612 | 0.990 | 0.960 | + | Aliased | |
+ Case(s) with leverage of 1.0000: PRESS statistic not defined.