General Knowledge · Research Methodology
In the context of data collection methods, evaluate the following statements: (1) Direct personal interviews generally yield more accurate and reliable data. (2) Mailed questionnaires reduce interviewer bias but can significantly increase non-response error. (3) Telephone interviews automatically ensure completely random sampling. Which of the statements given above are correct?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 11 and 2 only✓
- 21 and 3 only
- 32 and 3 only
- 41, 2 and 3
Correct answer
1 and 2 only
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