Table 4 Regression coefficient and corresponding probability values (p-values) for specific responses (calorific value and yield)
Parameter (coefficient) | Calorific value (c) | Yield value (y) | ||
|---|---|---|---|---|
Coefficient | P-value | Coefficient | P-value | |
Constant (A0) | 9680.969 | 0.01485 | −19.25 | 0.078605 |
X1(A1) | −20.1792 | 0.004058 | −0.00347 | 0.803372 |
X2(A2) | 11836.46 | 0.069057 | 66.5 | 0.010884 |
X3(A3) | −114.098 | 0.051354 | −0.0775 | 0.620817 |
X1 X2(A4) | 15.74179 | 0.009388 | 0.012626 | 0.363217 |
X1 X3(A5) | 0.085604 | 0.076392 | −2.6E−18 | 1 |
X2 X3(A6) | 37.521 | 0.272441 | 0.1 | 0.363217 |
X1 X1(A7) | 0.012962 | 0.050241 | 1.12E−19 | 1 |
X2 X2(A8) | −11004.2 | 0.017777 | −50 | 0.004867 |
X3 X3(A9) | 0.59609 | 0.118613 | 2.25E−17 | 1 |