In demography, 'cohort' refers to: MCQ with Answer and Explanation

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In demography, 'cohort' refers to:

A. All women of reproductive age

B. A group of people born in the same year or period

C. All people living in a country

D. A sample of the population

Answer: Option B

Solution (By JKSSB Mock Tests)

A cohort is a group sharing a common temporal experience, like birth year.

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. 0.1

B. 0.5

C. 0.2

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

In Bayes' theorem, P(A|B) is called:

A. Posterior probability

B. Marginal

C. Likelihood

D. Prior probability

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Correct Answer: Option A

Explanation:
P(A|B) updates prior using evidence, giving posterior.

This question belongs to: Accountancy and Statistics Statistics

Question #3

The base year of All India CPI (Combined) is:

A. 2016

B. 2012

C. 2011-12

D. 2010

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Correct Answer: Option B

Explanation:
The current CPI series has base year 2012.

This question belongs to: Accountancy and Statistics Statistics

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