Which method of collecting primary data is most suitable when the field of investigation is highly confidential and restricted? MCQ with Answer and Explanation

Question

Which method of collecting primary data is most suitable when the field of investigation is highly confidential and restricted?

A. Mailed questionnaire method

B. Direct personal interview

C. Information through local correspondents

D. Indirect oral investigation

Answer: Option B

Solution (By JKSSB Mock Tests)

Direct personal interview ensures maximum confidentiality as the investigator directly collects data without intermediaries.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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Assertion (A): Harmonic mean is greater than geometric mean for positive numbers. Reason (R): For positive numbers, AM ≥ GM ≥ HM.

A. Both A and R true, but R is not correct explanation

B. Both A and R true, and R is correct explanation

C. A is true, R is false

D. A is false, R is true

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Correct Answer: Option D

Explanation:
The correct inequality is AM ≥ GM ≥ HM, so HM ≤ GM, thus HM is not greater. So assertion false, reason true.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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Combined mean formula is essential when:

A. All groups have the same size

B. Data is qualitative

C. Merging means from groups of different sizes

D. Calculating mode

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Correct Answer: Option C

Explanation:
Combined mean = (n₁x̄₁ + n₂x̄₂) / (n₁ + n₂) weights each group's mean by its size, providing the correct overall mean when aggregating subgroup statistics.

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Question #3

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Which of the following is an example of primary data?

A. Data extracted from WHO reports

B. Data from Census of India 2011 used by a researcher

C. Data from RBI bulletin on inflation

D. Data collected through a survey questionnaire for a specific study

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Correct Answer: Option D

Explanation:
Primary data is original data collected firsthand for a specific purpose; a survey questionnaire is a primary source. The other options are secondary data.

This question belongs to: Accountancy and Statistics Statistics

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