Life expectancy at birth is computed using: MCQ with Answer and Explanation

Question
Life expectancy at birth is computed using:
A. Census only
B. Birth registration
C. Sample survey
D. Life table
Answer: Option D
Solution (By JKSSB Mock Tests)
Life table synthesizes age-specific mortality rates to compute life expectancy.
This question belongs to: Accountancy and Statistics Statistics
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Practice More Statistics Questions

Question #1
Bayes' theorem is expressed as P(A|B) = [P(B|A) × P(A)] / P(B). Here, P(A) is called the:
A. Posterior probability
B. Prior probability
C. Marginal probability
D. Likelihood
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Correct Answer: Option B

Explanation:
In Bayesian inference, P(A) is the prior probability, representing initial belief about hypothesis A before observing evidence B; P(A|B) is the updated posterior probability.
This question belongs to: Accountancy and Statistics Statistics
Question #2
If (AB) = 0, the two attributes are:
A. Perfectly correlated
B. Completely associated positively
C. Independent
D. Completely disassociated
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Correct Answer: Option D

Explanation:
(AB)=0 means no unit possesses both A and B, indicating perfect negative association.
This question belongs to: Accountancy and Statistics Statistics
Question #3
A good questionnaire should have:
A. Double negatives for clarity
B. Simple and clear language
C. Questions arranged in random order
D. Many open-ended questions to confuse
Discuss
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Correct Answer: Option B

Explanation:
Clarity and simplicity are fundamental principles.
This question belongs to: Accountancy and Statistics Statistics
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