Table 8.
Coefficient estimates demonstrating the response change per unit change in factor value when the remaining factors remain constant. The intercept is the average response of the runs. The coefficients are normalized by the average. For orthogonal factors the VIFs are 1; VIFs > 1 are the indications of multi-collinearity.
| Factor | Coefficient Estimate | df | Standard Error | 95% CI Low | 95% CI High | VIF |
|---|---|---|---|---|---|---|
| Intercept | −11.57 | 1 | 0.3766 | −12.40 | −10.74 | |
| A | 0.9689 | 1 | 0.4595 | −0.0424 | 1.98 | 1.02 |
| B | 0.9543 | 1 | 0.4490 | −0.0339 | 1.94 | 1.00 |
| C | 0.3957 | 1 | 0.3766 | −0.4332 | 1.22 | 1.02 |
| AB | −0.6684 | 1 | 0.5477 | −1.87 | 0.5371 | 1.02 |
| AC | 0.4974 | 1 | 0.4554 | −0.5050 | 1.50 | 1.00 |
| BC | −1.12 | 1 | 0.4484 | −2.11 | −0.1381 | 1.02 |