Table 4.
Analysis of variance, showing the effect of the variables as linear, square and interactions on the response OOC% of HYOOA (Y) of the D-optimal design.
| Source | Df | Sum of squares | Mean square | F value | P |
|---|---|---|---|---|---|
| Mean | 1 | 85.75 | 85.75 | ||
| Linear | 4 | 19.89 | 4.97 | 5.76 | 0.0030 |
| 2FI | 6 | 8.48 | 1.41 | 2.25 | 0.0987 |
| Quadratic | 4 | 4.28 | 1.07 | 2.38 | 0.1214 |
| Lack-of-fit | 10 | 4.50 | 0.45 | ||
| Pure error | 25 | 122.90 | 4.92 |