Table 3
Calculated regression coefficients for quadratic polynomial model of Y.
Term | Coefficient | SEa coefficient | t-value | p-value |
---|---|---|---|---|
Constant | 12.5268 | 0.1550 | 80.821 | 0.000 |
Z1 | 3.0104 | 0.1426 | 21.115 | 0.000 |
Z2 | −0.3600 | 0.1426 | −2.525 | 0.030 |
Z3 | 0.3994 | 0.1426 | 2.801 | 0.019 |
Z12 | −1.6275 | 0.2719 | −5.986 | 0.000 |
Z22 | 0.3895 | 0.2719 | 1.432 | 0.183 |
Z32 | −0.5295 | 0.2719 | −1.948 | 0.080 |
Z1Z2 | −0.5467 | 0.1594 | −3.430 | 0.006 |
Z1Z3 | 0.1520 | 0.1594 | 0.954 | 0.363 |
Z2Z3 | −0.4787 | 0.1594 | −3.003 | 0.013 |