Standard Deviation
- Example:
- We have different tasks taking different time for each agent
- We have data for last 7 days
- Solution:
- Find mean time taken by an agent (sample mean)
- Find mean time taken by all agents (population mean)
- Min: 1 min
- Max: 60 mins
- Bucket time: 12 buckets : 5 mins
- 0- 5 min: a
- 6-10 min: b
- ...
- For an agent: | Agent | actual time taken | ticket/task | bucket | | ----- | ----------------- | ----------- | ------ | | A | 6 mins | t1 | b | | A | 4 mins | t2 | a | | A | 15 mins | t3 | c | | A | 43 mins | t5 | h | | A | 32 mins | t4 | f | | A | 3 mins | t8 | a |
For Agent A,
| bucket name (bn) | frequency (f) | tn * f | (tn-mean_tn)^2 | (tn-mean_tn)^2 * f | # tickets (t) |
|---|---|---|---|---|---|
| 5 | 2 | ||||
| 5-10 | 1 | ||||
| 10-15 | 1 | ||||
| 15-20 | 0 | ||||
| e | 0 | ||||
| f | 1 | ||||
| g | 0 | ||||
| h | 1 |
For all agents & tasks: