In Bayes' theorem, the initial probabilities before observing evidence are called: MCQ with Answer and Explanation

In Bayes' theorem, the initial probabilities before observing evidence are called:
A. Likelihoods
B. Posterior probabilities
C. Marginal probabilities
D. Prior probabilities
Answer: Option D
Solution (By JKSSB Mock Tests)
Prior probabilities represent the initial degree of belief.

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Practice More Statistics Questions

Question #1
The probability that a leap year has 53 Mondays is:
A. 3/7
B. 2/7
C. 1/7
D. 5/7

Correct Answer: Option B


Explanation:
Leap year has 366 days = 52 weeks + 2 days. Favorable pairs with Monday: (Sun,Mon), (Mon,Tue) => 2/7.

This question belongs to: Accountancy and Statistics Statistics
Question #2
Tabulation of data primarily serves to:
A. Collect raw data from respondents
B. Determine the sample size for a study
C. Calculate measures of central tendency
D. Organize classified data into rows and columns for systematic presentation

Correct Answer: Option D


Explanation:
Tabulation arranges classified data in a compact, organized format using rows and columns, facilitating comparison, analysis, and interpretation of statistical information.

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Question #3
Perinatal Mortality Rate includes stillbirths from which gestational age?
A. 24 weeks
B. 20 weeks
C. 32 weeks
D. 28 weeks

Correct Answer: Option D


Explanation:
Per WHO definition, perinatal mortality includes late fetal deaths (stillbirths) from 28 completed weeks of gestation and early neonatal deaths (first 7 days), capturing risks around birth.

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