Table 8. Linear regression coefficients (values and SE), t-test value and significance, and collinearity statistics for the independent variable in each model.
| Model | Unstandardized coefficients | t | p | Collinearity statistics | |||
|---|---|---|---|---|---|---|---|
| B | Std. Error | Tolerance | VIF | ||||
| 1 | (Constant) | 4.4E+01 | 6.4E+00 | 6.93 | < 0.001 | ||
| Skew(L) | 2.1E+01 | 2.4E+00 | 8.42 | < 0.001 | 1.00 | 1.00 | |
| 2 | (Constant) | 1.2E+02 | 9.3E+00 | 12.61 | < 0.001 | ||
| Skew(L) | 2.6E+01 | 1.6E+00 | 16.19 | < 0.001 | 0.85 | 1.17 | |
| SF(3–5) | −8.2E+07 | 9.5E+06 | −8.62 | < 0.001 | 0.85 | 1.17 | |
| 3 | (Constant) | 4.5E+01 | 1.1E+01 | 3.95 | < 0.001 | ||
| Skew(L) | 2.2E+00 | 3.3E+00 | 0.66 | .520 | 0.08 | 11.97 | |
| SF(3–5) | −1.1E+08 | 7.2E+06 | −15.10 | < 0.001 | 0.64 | 1.57 | |
| SF(1–3) | 1.1E+08 | 1.5E+07 | 7.44 | < 0.001 | 0.07 | 13.77 | |
| 4 | (Constant) | 3.9E+01 | 6.7E+00 | 5.80 | < 0.001 | ||
| SF(3–5) | −1.1E+08 | 6.7E+06 | −16.67 | < 0.001 | 0.74 | 1.35 | |
| SF(1–3) | 1.2E+08 | 4.7E+06 | 25.95 | < 0.001 | 0.74 | 1.35 | |