The CPI (Rural) and CPI (Urban) are compiled by: MCQ with Answer and Explanation

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The CPI (Rural) and CPI (Urban) are compiled by:

A. NITI Aayog

B. Labour Bureau

C. Central Statistics Office (NSO)

D. RBI

Answer: Option C

Solution (By JKSSB Mock Tests)

The National Statistical Office (NSO), under MoSPI, compiles the CPI for rural, urban, and combined.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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If the crude birth rate of a country is 25 and crude death rate is 10, and net migration rate is -2 per 1000, the growth rate is:

A. 37 per 1000

B. 17 per 1000

C. 13 per 1000

D. 15 per 1000

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Correct Answer: Option C

Explanation:
Growth rate = 25 - 10 + (-2) = 13 per 1000.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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In a factory, machines A, B, and C produce 30%, 45%, and 25% of total output, with defect rates of 2%, 3%, and 4% respectively. If a randomly selected item is defective, the probability it was produced by machine B is approximately:

A. 0.50

B. 0.43

C. 0.30

D. 0.45

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Correct Answer: Option B

Explanation:
Using Bayes' theorem: P(B|Defective) = [P(Defective|B) × P(B)] / [Σ P(Defective|machine) × P(machine)] = (0.03×0.45) / (0.02×0.30 + 0.03×0.45 + 0.04×0.25) = 0.0135 / 0.0315 ≈ 0.4286 ≈ 0.43.

This question belongs to: Accountancy and Statistics Statistics