Which of the following is a direct method of collecting primary data? MCQ with Answer and Explanation

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Which of the following is a direct method of collecting primary data?

A. Referring to old records

B. Observation method

C. Reviewing literature

D. Using internet databases

Answer: Option B

Solution (By JKSSB Mock Tests)

Observation involves directly watching and recording behaviors.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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Laspeyres price index is 115 and Paasche price index is 110. The Bowley index (arithmetic mean of L and P) is approximately:

A. 112.5

B. 113.5

C. 110.0

D. 112.0

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Correct Answer: Option A

Explanation:
Bowley index = (L+P)/2 = (115+110)/2 = 112.5. (Note: some books call Marshall-Edgeworth-Bowley index, but this is simple arithmetic average).

This question belongs to: Accountancy and Statistics Statistics

Question #2

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If the arithmetic mean of 5 numbers is 20, and the arithmetic mean of another 3 numbers is 28, the combined mean of all 8 numbers is:

A. 24

B. 25

C. 23

D. 22

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Correct Answer: Option C

Explanation:
Combined mean = (5×20 + 3×28) / (5+3) = (100 + 84) / 8 = 184 / 8 = 23. This formula weights each group's mean by its size.

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Question #3

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In probability, an event that contains all possible outcomes is called:

A. Sure event

B. Impossible event

C. Simple event

D. Null event

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Correct Answer: Option A

Explanation:
Sure event equals the sample space, P = 1.

This question belongs to: Accountancy and Statistics Statistics

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