Table 2 The least-squares fit and coefficient estimate
Variables | Coefficient estimate | Standard error | t value | p value |
|---|---|---|---|---|
Intercept | 572.72 | 5.78 | 99.06 | 0.000 |
X1 | − 80.09 | 3.54 | − 22.62 | 0.000 |
X2 | 71.51 | 3.54 | 20.20 | 0.000 |
X5 | − 58.55 | 3.54 | − 16.54 | 0.000 |
X 21 | − 59.29 | 5.21 | − 11.38 | 0.000 |
X 22 | − 56.39 | 5.21 | − 10.82 | 0.000 |
X 25 | − 35.80 | 5.21 | − 6.87 | 0.001 |
X1 X2 | − 1.80 | 5.01 | − 0.18 | 0.864 |
X1 X5 | − 41.40 | 5.01 | − 4.13 | 0.009 |
X2 X5 | − 10.19 | 5.01 | − 1.02 | 0.356 |