Table 6. Factorial experimental design analysis of variance obtained .
| Angle of repose | Density | Drug loading | |
| R-squared | 0.9713 | 0.9890 | 0.9672 |
| Adj R-squared | 0.9426 | 0.9774 | 0.9344 |
| Pred R-squared | 0.7629 | 0.9216 | 0.7670 |
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