The weighted mean is used when: MCQ with Answer and Explanation

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The weighted mean is used when:

A. Different items have different degrees of importance

B. All items have the same importance

C. Data are symmetric

D. Data are qualitative

Answer: Option A

Solution (By JKSSB Mock Tests)

Weights reflect relative importance of each item.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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If the number of women aged 15-49 is 20,000 and live births are 500, GFR per 1000 women is:

A. 50

B. 25

C. 40

D. 20

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Correct Answer: Option B

Explanation:
GFR = (500 / 20000) × 1000 = 25 per 1000 women.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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For a given data, Σp₁q₀ = 600, Σp₀q₀ = 500, Σp₁q₁ = 700, Σp₀q₁ = 600. The value index is:

A. 120

B. 140

C. 116.67

D. 125

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Correct Answer: Option B

Explanation:
Value index = (Σp₁q₁ / Σp₀q₀) × 100 = 700/500 × 100 = 140.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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The algebraic sum of the deviations of a set of values from their arithmetic mean is always:

A. Zero

B. Negative

C. Minimum

D. Positive

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Correct Answer: Option A

Explanation:
A fundamental property of the arithmetic mean is that the sum of deviations of items from the mean is identically zero.

This question belongs to: Accountancy and Statistics Statistics

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