| Model term |
Coefficient |
F-value |
p-value |
| Constant |
-0.85776 |
|
|
| PH |
1.52437 |
10.67 |
0.008 |
| L |
-0.00453 |
0.06 |
0.818 |
| Y |
3.38646 |
3.88 |
0.077 |
| T |
0.37703 |
5.36 |
0.043 |
| PH2 |
-0.15354 |
17.77 |
0.002 |
| L2 |
-0.00006 |
0.42 |
0.533 |
| Y2 |
-4.65104 |
26.09 |
0.000 |
| T2 |
-0.00600 |
6.95 |
0.025 |
| PH-L |
0.00119 |
0.60 |
0.456 |
| PH-T |
-0.00156 |
0.04 |
0.842 |
| PH-Y |
0.18125 |
1.40 |
0.262 |
| L-T |
-0.00008 |
0.04 |
0.842 |
| L-Y |
0.00906 |
1.40 |
0.264 |
| Y-T |
0.00781 |
0.04 |
0.842 |
|
| R2=92.05% and adjusted R2=80.91% |
| Table 2: Coefficient estimates and analysis of variance (ANOVA) for the response surface quadratic model. |
