Bayes' theorem is primarily used to compute: MCQ with Answer and Explanation

Bayes' theorem is primarily used to compute:
A. Prior probability
B. Joint probability
C. Marginal probability
D. Posterior probability
Answer: Option D
Solution (By JKSSB Mock Tests)
Bayes' theorem updates prior beliefs with new evidence to yield posterior probabilities.

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Practice More Statistics Questions

Question #1
Two events A and B are said to be mutually exclusive if:
A. P(A ∩ B) = 0
B. P(A|B) = P(A)
C. P(A ∩ B) = P(A) × P(B)
D. P(A ∪ B) = 1

Correct Answer: Option A


Explanation:
Mutually exclusive events cannot occur simultaneously, meaning their intersection is the empty set (probability is zero).

This question belongs to: Accountancy and Statistics Statistics
Question #2
Assertion (A): For independent events A and B, P(A|B) = P(A). Reason (R): Independence implies that knowledge of B does not change the probability of A.
A. A is false but R is true
B. Both A and R are true, and R is the correct explanation of A
C. Both A and R are true, but R is not the correct explanation of A
D. A is true but R is false

Correct Answer: Option B


Explanation:
By definition, if A and B are independent, the conditional probability P(A|B) equals the unconditional probability P(A), as the occurrence of B provides no information about A.

This question belongs to: Accountancy and Statistics Statistics
Question #3
Which measure of central tendency is most suitable for qualitative ordinal data like intelligence rankings?
A. Median
B. Mean
C. Geometric mean
D. Mode

Correct Answer: Option A


Explanation:
Ordinal data can be ranked; the median is the appropriate measure as it does not require numerical differences.

This question belongs to: Accountancy and Statistics Statistics