Table 4.
Summary of the results of statistical analyses and model equations for the measured responses
| Models | Sequential P-value | Lack of fit P-value | SD | R2 | Adjusted R2 | Remark |
|---|---|---|---|---|---|---|
| Droplet size (nm; Y1) | ||||||
| Linear | 0.0077 | 0.0278 | 97.25 | 0.7041 | 0.6302 | – |
| 2FI | 0.0238 | 0.0503 | 70.38 | 0.8644 | 0.8063 | – |
| Quadratic | 0.0472* | 0.1021† | 45.22 | 0.9600 | 0.9200 | Suggested |
| Cubic | 0.0217 | 0.6675 | 16.29 | 0.9969 | 0.9896 | Aliased |
| Percent dissolved in 15 min (%; Y2) | ||||||
| Linear | <0.0001* | 0.1139† | 9.25 | 0.9287 | 0.9109 | Suggested |
| 2FI | 0.8107 | 0.0966 | 9.85 | 0.9293 | 0.8990 | – |
| Quadratic | 0.8956 | 0.0618 | 11.4 | 0.9324 | 0.8648 | Aliased |
| Cubic | 0.0381 | 0.2049 | 4.95 | 0.9923 | 0.9745 | – |
| Total quantity (mg; Y3) | ||||||
| Linear | <0.0001 | – | 4.77 | 0.9988 | 0.9985 | – |
| 2FI | <0.0001* | – | 0.00 | 1.0000 | 1.0000 | Suggested |
| Quadratic | – | – | 0.00 | 1.0000 | 1.0000 | – |
| Cubic | – | – | 0.00 | 1.0000 | 1.0000 | Aliased |
Notes:
*
The sequential P-value of <0.05 indicates that the model terms are significant up to a 95% confidence level.
†
The lack of fit P-value of >0.1 indicates the adequacy of the model fit. Similar values of R2 and adjusted R2 represent a good model fitting. R2, squared correlation coefficient.
Abbreviations: 2FI, two-factor interaction; SD, standard deviation.