Daily Commission(in Rs.) | No. of Salesmen |
100−120 | 20 |
120−140 | 45 |
140−160 | 22 |
160−180 | 09 |
180−200 | 04 |
Interval | xi | fi | di=xi−A | fidi |
100−120 | 110 | 20 | −40 | −800 |
120−140 | 130 | 45 | −20 | −900 |
140−160 | 150 | 22 | 0 | 0 |
160−180 | 170 | 09 | 20 | 180 |
180−200 | 190 | 04 | 40 | 160 |
Total | ∑fi = 100 | ∑fidi =−1360 |