Table 3.
Summary of the results of the statistical analysis and model equations for the measured responses.
| Model | SD | R 2 | R2 (adj) | p value | Lack of fit p value | PRESS | Remark |
|---|---|---|---|---|---|---|---|
| Droplet size (nm) | |||||||
| Linear | 17.53 | 0.8807 | 0.8755 | <.0001 | <.0001 | 16,920.15 | – |
| Quadratic | 9.25 | 0.9689 | 0.9653 | <.0001 | .0003 | 5,123.73 | – |
| Special cubic | 6.95 | 0.9829 | 0.9804 | <.0001 | .0086 | 2,928.82 | – |
| Cubic | 3.54 | 0.9959 | 0.9949 | <.0001 | .9668 | 8,13.19 | Suggested |
| INS stability (%) | |||||||
| Linear | 5.16 | 0.7581 | 0.7476 | <.0001 | <.0001 | 1,523.40 | – |
| Quadratic | 2.70 | 0.9383 | 0.9312 | <.0001 | .0119 | 433.10 | – |
| Special cubic | 2.29 | 0.9567 | 0.9505 | .0001 | .0659 | 312.15 | – |
| Cubic | 1.77 | 0.9759 | 0.9703 | <.0001 | .4758 | 207.19 | Suggested |
| INS leakage (%) | |||||||
| Linear | 3.84 | 0.7333 | 0.7217 | <.0001 | .0107 | 831.44 | – |
| Quadratic | 2.30 | 0.9103 | 0.8999 | <.0001 | .6858 | 324.25 | – |
| Special cubic | 2.23 | 0.9176 | 0.9058 | .0616 | .7628 | 312.77 | – |
| Cubic | 2.02 | 0.9372 | 0.9227 | .0131 | .9464 | 262.17 | Suggested |
INS, insulin; SD, standard deviation; PRESS, predicted residual error sum of squares.