Advantages of sampling technique can be enumerated as:
Correct answer: D. All of the above
- A. Since the area of sampling units to be measured is small, greater care can be exercised in collection of data
- B. Supervision can be improved
- C. Fewer but better trained personnel will suffice
- D. All of the above
Explanation
Sampling reduces the area and number of units needing measurement, allowing closer supervision, more careful observations, and the use of fewer but better-trained staff. Thus, all three statements describe genuine advantages.
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