N˚ of variables | Correlation | p-value (0.05) | Selections |
1 | 0.574 | 0.004183 | Total phosphorus (mg/L) |
2 | 0.609 | 0.002041 | BOD5 (mg/L), Total phosphorus (mg/L) |
3 | 0.611 | 0.001954 | COD (mg/L), BOD5 (mg/L), Total phosphorus (mg/L) |
4 | 0.614 | 0.00183 | COD (mg/L), BOD5 (mg/L), Total phosphorus (mg/L), Total copper (mg/L) |
5 | 0.614 | 0.00183 | COD (mg/L), BOD5 (mg/L), Total phosphorus (mg/L), Total copper (mg/L), Total lead (mg/L) |