Table 4 Statistical analysis of the data (sum, average, variance).
From: Domestic wastewater treatment by Pistia stratiotes in constructed wetland
Groups | Count | Sum | Average | Variance |
|---|---|---|---|---|
pH | 4 | 28.45 | 7.1125 | 0.080625 |
TDS | 4 | 2655 | 663.75 | 188,256.3 |
TSS | 4 | 1805 | 451.25 | 91,172.92 |
Chloride | 4 | 550 | 137.5 | 7475 |
Sulphate | 4 | 2194 | 548.5 | 127,669.7 |
Total oil and grease (TOG) | 4 | 206 | 51.5 | 1069.667 |
BOD5 | 4 | 433 | 108.25 | 4844.25 |
COD | 4 | 499 | 124.75 | 6481.583 |
Ammonia | 4 | 18.05 | 4.5125 | 9.673958 |
