Profession | Mean | Standard deviation | Coefficient of variation | Range |
College teachers | 122 | 15.73 | 12.89 | 34 |
School teachers | 120.7 | 16.66 | 13.80 | 35 |
Clerks | 111.66 | 22.11 | 19.81 | 43 |
Sweepers | 25 | 0 | 0 | 05 |