When constructing a frequency polygon, the frequencies are plotted against: MCQ with Answer and Explanation

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When constructing a frequency polygon, the frequencies are plotted against:

A. Lower class limits

B. Cumulative frequencies

C. Class marks (midpoints)

D. Upper class limits

Answer: Option C

Solution (By JKSSB Mock Tests)

A frequency polygon connects the points formed by the class frequencies plotted at the exact midpoints of the class intervals.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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If the Net Reproduction Rate (NRR) is exactly 1, what does it signify for the population over the long term, assuming no migration?

A. The population will eventually shrink

B. The population is exactly replacing itself

C. The population will grow exponentially

D. The population will double in one generation

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Correct Answer: Option B

Explanation:
An NRR of 1 means each woman is replacing herself with exactly one surviving daughter, indicating replacement-level fertility.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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Vital statistics are used for:

A. All of the above

B. Planning health services

C. Actuarial calculations

D. Estimating population growth

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Correct Answer: Option A

Explanation:
Vital statistics inform public health planning, demographic estimates, and insurance mathematics.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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If (A)=80, (B)=60, N=100, and (AB)=50, the value of (Aβ) is:

A. 10

B. 20

C. 30

D. 40

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Correct Answer: Option C

Explanation:
(Aβ) = (A) - (AB) = 80 - 50 = 30.

This question belongs to: Accountancy and Statistics Statistics

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