Bayes' theorem is often used in: MCQ with Answer and Explanation

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Bayes' theorem is often used in:

A. Testing independence

B. Constructing index numbers

C. Calculating the mean of a sample

D. Updating probabilities after new evidence

Answer: Option D

Solution (By JKSSB Mock Tests)

It's used for probabilistic inference and decision making under uncertainty.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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In the context of data collection, what is the fundamental difference between a schedule and a questionnaire?

A. A schedule is filled by the enumerator, while a questionnaire is filled by the respondent.

B. A schedule contains more questions than a questionnaire.

C. A questionnaire is always sent by mail, whereas a schedule is emailed.

D. There is no difference; they are synonymous.

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Correct Answer: Option A

Explanation:
Schedules require trained enumerators to ask questions and record answers, reducing non-response rates compared to questionnaires.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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In a Poisson distribution, P(X=0) = e^{-λ}. If λ=2, P(X=0) is about:

A. 0.2

B. 0.135

C. 0.05

D. 0.271

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Correct Answer: Option B

Explanation:
e^{-2} ≈ 0.1353.

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Question #3

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A census collects data on:

A. Only literate population

B. Sample of population

C. Only urban population

D. Entire population

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Correct Answer: Option D

Explanation:
Census is a complete enumeration of all individuals in a country.

This question belongs to: Accountancy and Statistics Statistics

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