Table 2. Coefficients for the Models Obtained in the Experimental Design E-1a.
| coefficients | YL1 | YL2 | YL3 | YL4 | YL5 | YL6 |
|---|---|---|---|---|---|---|
| a0 | 18.83 | 62.69 | 2.02 | 43.21 | 49.04 | 80.11 |
| a1 | –0.19 | –0.08 | 0.01 | 1.43 | –0.99* | 4.37 |
| a2 | –1.79b | –2.21b | –0.24b | 6.07b | 20.86b | –36.90b |
| a3 | –0.30 | –0.20 | –0.03 | 2.03b | 1.32b | 15.47b |
| a12 | 0.21 | –0.03 | –0.01 | 1.13 | 0.56 | –4.15 |
| a13 | 0.22 | –0.06 | –0.01 | –0.77 | –2.51b | 8.41 |
| a23 | 0.20 | 0.19 | –0.01 | –0.32 | 0.57 | –7.17 |
| R2 | 63.72 | 88.98 | 90.08 | 94.82 | 99.62 | 92.80 |
| SEE | 19.95 | 11.14 | 0.11 | 22.19 | 18.62 | 16.65 |
Note: Regression coefficient for the coded variable.
Significant coefficients for 95% confidence; SSE: standard error of estimates.