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प्रश्न
Two workers on the same job show the following results:
| Worker P | Worker Q | |
| Meantime for completing the job (hours) | 33 | 21 |
| Standard Deviation (hours) | 9 | 7 |
- Regarding the time required to complete the job, which worker is more consistent?
- Which worker seems to be faster in completing the job?
उत्तर
For worker P,
C.V. = `"S.D."/"Mean" xx 100`
= `9/33 xx 100`
= 27.27
For worker Q,
C.V. = `"S.D."/"Mean" xx 100`
= `7/21 xx 100`
= 33.33
(i) ∵ (C.V.)p < (C.V.)Q
∴ worker P is more consistent
(ii) Since, (C.V.)Q > (C.V.)p, worker Q seems to be faster in completing the job.
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