TFR of 2.1 children per woman is called replacement-level fertility because it: MCQ with Answer and Explanation

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TFR of 2.1 children per woman is called replacement-level fertility because it:

A. Results in zero population growth in the long run

B. Ensures population decline

C. Equals NRR=1 exactly

D. Doubles population

Answer: Option A

Solution (By JKSSB Mock Tests)

TFR of about 2.1 ensures each generation exactly replaces itself (assuming low mortality), leading to eventual zero growth.

This question belongs to: Accountancy and Statistics Statistics

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Practice More Statistics Questions

Question #1

Weighted mean is preferred over simple arithmetic mean when:

A. All observations are equally important

B. The data is qualitative

C. Observations have different levels of importance or reliability

D. The sample size is very small

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Correct Answer: Option C

Explanation:
Weighted mean assigns different weights to observations based on their relative importance, providing a more accurate central value when some data points carry more significance than others.

This question belongs to: Accountancy and Statistics Statistics

Question #2

The number of observations falling in a particular class is called:

A. Class frequency

B. Relative frequency

C. Cumulative frequency

D. Class mark

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Correct Answer: Option A

Explanation:
Class frequency is the count of data points within a class interval.

This question belongs to: Accountancy and Statistics Statistics

Question #3

In attribute theory, consistency of data requires that all ultimate class frequencies are:

A. Multiples of 10

B. Positive integers or zero

C. Greater than marginal frequencies

D. Equal

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Correct Answer: Option B

Explanation:
Consistency checks ensure no calculated frequency (e.g., from marginal totals) is negative, as counts cannot be negative; all must be non-negative integers for logical validity.

This question belongs to: Accountancy and Statistics Statistics

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