Table III.
Summary of Results of: Model Analysis, Lack of Fit and R-square Analysis for Measured Responses
| Source | Y 1 | Y 2 | Y 3 | |||
|---|---|---|---|---|---|---|
| Sum of squares | P > F | Sum of squares | P > F | Sum of squares | P > F | |
| Model analysis | ||||||
| Mean vs. total | 953.44 | 25,918.13 | 69,559.39 | |||
| Linear vs. mean | 203.43 | 0.0115 | 3,817.85 | 0.0609 | 8,647.99 | 0.0087 |
| 2FIa vs. linear | 18.75 | 0.7118 | 455.62 | 0.8094 | 1,457.86 | 0.3927 |
| Quadratic vs. 2FI | 81.69 | 0.0487 | 3,517.22 | 0.0023 | 3,032.47 | 0.0092 |
| Cubic vs. quadratic | 23.69 | 0.0667 | 238.23 | 0.0899 | 385.41 | 0.0628 |
| Residual | 1.12 | 15.44 | 17.04 | |||
| Total | 1,282.11 | 33,962.49 | 83,100.16 | |||
| Lack of fit | ||||||
| Linear | 124.13 | 0.0395 | 4,211.07 | 0.0163 | 4,875.74 | 0.0156 |
| 2FI | 105.38 | 0.0311 | 3,755.45 | 0.0122 | 3,417.88 | 0.0148 |
| Quadratic | 23.69 | 0.0667 | 238.23 | 0.0899 | 385.41 | 0.0628 |
| Cubic | 0.000 | 0.000 | 0.000 | |||
| Pure error | 1.12 | 15.44 | 17.04 | |||
| R 2 | R a 2 | PRESS | R 2 | R a 2 | PRESS | R 2 | R a 2 | PRESS | |
|---|---|---|---|---|---|---|---|---|---|
| R2 analysis | |||||||||
| Linear | 0.619 | 0.5150 | 258.03 | 0.475 | 0.3313 | 6,764.99 | 0.637 | 0.5401 | 8,608.39 |
| 2FI | 0.676 | 0.4330 | 524.30 | 0.531 | 0.1797 | 10,468.81 | 0.746 | 0.5561 | 10,430.84 |
| Quadratic | 0.925 | 0.7886 | 381.63 | 0.968 | 0.9117 | 3,846.43 | 0.970 | 0.9168 | 6,204.88 |
| Cubic | 0.997 | 0.9762 | NDb | 0.998 | 0.9866 | ND | 0.999 | 0.9912 | ND |
aTwo-factor interaction
bPRESS statistic not defined