The time reversal test is satisfied if P₀₁ × P₁₀ = 1. This ensures: MCQ with Answer and Explanation

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The time reversal test is satisfied if P₀₁ × P₁₀ = 1. This ensures:

A. Index is free from time bias

B. Index uses base year weights

C. Index satisfies factor reversal

D. Index is the geometric mean

Answer: Option A

Solution (By JKSSB Mock Tests)

Time reversal test checks that the index is symmetrical over time.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

If Yule's coefficient Q = 0 for attributes A and B, this indicates:

A. Perfect positive association

B. Data inconsistency

C. No association (independence)

D. Perfect negative association

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Correct Answer: Option C

Explanation:
Yule's Q = 0 when (AB)(αβ) = (Aβ)(αB), which is the condition for statistical independence between attributes A and B in a 2×2 table.

This question belongs to: Accountancy and Statistics Statistics

Question #2

In demographic terminology, 'Morbidity' refers to:

A. Sickness or disease rates

B. Birth rates

C. Migration rates

D. Death rates

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Correct Answer: Option A

Explanation:
Morbidity describes the incidence or prevalence of a disease or illness within a population.

This question belongs to: Accountancy and Statistics Statistics

Question #3

The weighted harmonic mean is appropriate for averaging:

A. Prices when quantities purchased are the weights

B. Ratios where the denominators are the weights

C. Speeds when distances traveled at each speed are equal

D. Test scores with equal importance

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Correct Answer: Option B

Explanation:
Weighted harmonic mean = Σw / Σ(w/x), ideal for averaging rates or ratios (e.g., price per unit) when the weights correspond to the denominators (e.g., quantities), ensuring correct aggregation.

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