The formula for weighted arithmetic mean is: MCQ with Answer and Explanation

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The formula for weighted arithmetic mean is:

A. Σwx / Σw

B. Σx / Σw

C. Σwx / n

D. Σw / Σx

Answer: Option A

Solution (By JKSSB Mock Tests)

Weighted mean = Σ(w_i x_i) / Σ w_i.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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In the context of population studies, 'Fecundity' means:

A. Death rate of women in childbirth

B. Number of stillbirths

C. Physiological maximum capacity to reproduce

D. Actual number of live births

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Correct Answer: Option C

Explanation:
Fecundity is the biological capability to bear children, whereas fertility is the actual realization of births.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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The process of arranging raw data into a table is:

A. Coding

B. Classification

C. Editing

D. Tabulation

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Correct Answer: Option D

Explanation:
Tabulation is the systematic presentation of data in rows and columns.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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Crude Birth Rate is expressed per:

A. 1000 population

B. 100 population

C. 1000 women

D. 1000 live births

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Correct Answer: Option A

Explanation:
CBR = (Number of live births in a year / Mid-year total population) × 1000.

This question belongs to: Accountancy and Statistics Statistics

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