Mathematics · Statistics
Which method of collecting primary data is most appropriate and economical when the area of investigation is very large, and the informants are mostly literate and conscientious about their duties?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Indirect oral investigation method
- 2Mailed questionnaire method✓
- 3Information through schedules in charge of enumerators
- 4Direct personal interview method
Correct answer
Mailed questionnaire method
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