| Standardized indicator | Z score (X1) | Z score (X2) | Z score (X3) | Z score (X4) | Z score (X5) |
| Zscore (X1) | 1 | 0.313 | 0.758 | 0.657 | 0.623 |
| Zscore (X2) | 0.313 | 1 | −0.256 | 0.556 | 0.727 |
| Zscore (X3) | 0.758 | −0.256 | 1 | 0.376 | 0.108 |
| Zscore (X4) | 0.657 | 0.556 | 0.376 | 1 | 0.744 |
| Zscore (X5) | 0.623 | 0.727 | 0.108 | 0.744 | 1 |