Harmonic mean is undefined if: MCQ with Answer and Explanation

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Harmonic mean is undefined if:

A. Data are continuous

B. All observations are positive

C. Data are discrete

D. Any observation is zero

Answer: Option D

Solution (By JKSSB Mock Tests)

Reciprocals of zero are infinite, making HM undefined.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

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Bayes' theorem is primarily used to compute:

A. Joint probability

B. Posterior probability

C. Prior probability

D. Marginal probability

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Correct Answer: Option B

Explanation:
Bayes' theorem updates prior beliefs with new evidence to yield posterior probabilities.

This question belongs to: Accountancy and Statistics Statistics

Question #2

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Yule's coefficient of association Q is defined as (ad - bc)/(ad + bc), where ad = (AB)×(αβ) and bc = (Aβ)×(αB). This coefficient is also known as:

A. Coefficient of concordance

B. Coefficient of determination

C. Coefficient of correlation

D. Coefficient of colligation

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Correct Answer: Option D

Explanation:
Q is Yule's coefficient of association, also called coefficient of colligation.

This question belongs to: Accountancy and Statistics Statistics

Question #3

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

A. Prior probability

B. Posterior probability

C. Likelihood

D. Marginal

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Correct Answer: Option B

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

This question belongs to: Accountancy and Statistics Statistics

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