If Net Reproduction Rate (NRR) = 1.2, it means: MCQ with Answer and Explanation

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If Net Reproduction Rate (NRR) = 1.2, it means:

A. Each generation is replacing itself and increasing by 20%.

B. The population will immediately decline.

C. The population has reached replacement level.

D. The infant mortality rate is zero.

Answer: Option A

Solution (By JKSSB Mock Tests)

NRR > 1 indicates the next generation is larger by 20%, leading to population growth.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

If P(A)=0.2 and P(B)=0.3, the minimum possible value of P(A∪B) is:

A. 0.2

B. 0.1

C. 0.5

D. 0.3

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Correct Answer: Option D

Explanation:
Minimum occurs when one event is subset of the other; if B⊂A, then P(A∪B)=P(A)=0.2. But A cannot be larger than B? Actually min union is max(P(A),P(B)) = 0.3.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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 double in one generation

B. The population will grow exponentially

C. The population is exactly replacing itself

D. The population will eventually shrink

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Correct Answer: Option C

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 #3

Assertion (A): Median is better than Mean for skewed distributions. Reason (R): Median is entirely immune to extreme values.

A. Both A and R are true but R is NOT the correct explanation

B. A is true but R is false

C. Both A and R are true and R is the correct explanation

D. A is false but R is true

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Correct Answer: Option C

Explanation:
Median is a positional average based on rank, so an extreme outlier does not shift the median's location.

This question belongs to: Accountancy and Statistics Statistics

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