The arithmetic mean of the following frequency distribution of number of accidents X on week working days is:
| X: | 2 | 4 | 6 | 8 | 10 | 12 |
| Frequency: | 3 | 4 | 2 | 1 | 4 | 2 |
1
4.625
2
6.625
3
7.625
4
5.625
The arithmetic mean of the following frequency distribution of number of accidents X on week working days is:
| X: | 2 | 4 | 6 | 8 | 10 | 12 |
| Frequency: | 3 | 4 | 2 | 1 | 4 | 2 |