In a frequency distribution, if the class midpoints are 10, 20, 30, 40, the class width is: MCQ with Answer and Explanation

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In a frequency distribution, if the class midpoints are 10, 20, 30, 40, the class width is:

A. 5

B. 15

C. 20

D. 10

Answer: Option D

Solution (By JKSSB Mock Tests)

Difference between consecutive midpoints = 10, so class width = 10.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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The total fertility rate in India is currently around replacement level (2.1). Which state has the highest TFR?

A. Tamil Nadu

B. West Bengal

C. Kerala

D. Bihar

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Correct Answer: Option D

Explanation:
Bihar has one of the highest TFRs (around 3.0).

This question belongs to: Accountancy and Statistics Statistics

Question #2

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The civil registration system in India records:

A. Census data

B. Births, deaths, and marriages

C. Migration only

D. Educational data

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Correct Answer: Option B

Explanation:
Civil registration is the continuous, permanent, compulsory recording of vital events.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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Net Reproduction Rate (NRR) differs from Gross Reproduction Rate (GRR) because NRR takes into account:

A. Male births

B. Mortality rates of mothers

C. Migration rates

D. Economic status

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Correct Answer: Option B

Explanation:
NRR adjusts the GRR by factoring in the probability that a female child will survive through her reproductive years.

This question belongs to: Accountancy and Statistics Statistics

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