Life expectancy at birth is best interpreted as: MCQ with Answer and Explanation

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Life expectancy at birth is best interpreted as:
A. The median age at death in a given year
B. The age by which 50% of the population has died
C. The maximum age reached by any individual in the population
D. The average number of years a newborn is expected to live if current mortality patterns persist
Answer: Option D
Solution (By JKExamLibrary)
Life expectancy is a period measure derived from a life table, representing the mean survival time for a hypothetical cohort experiencing current age-specific death rates throughout life.
This question belongs to: Accountancy and Statistics Statistics

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Practice More Statistics Questions

Question #1 Report Error
A sample space has 6 equally likely outcomes. The probability of an event with 2 outcomes is:
A. 1/3
B. 2/3
C. 1/2
D. 1/6
Discuss

Correct Answer: Option A

Explanation:
P = 2/6 = 1/3.
This question belongs to: Accountancy and Statistics Statistics
Question #2 Report Error
Which of the following is a valid probability value?
A. -0.2
B. 2
C. 0.75
D. 1.5
Discuss

Correct Answer: Option C

Explanation:
Probability must lie between 0 and 1 inclusive. 0.75 is valid.
This question belongs to: Accountancy and Statistics Statistics
Question #3 Report Error
Bayes' theorem is a formula to calculate:
A. Union of events
B. Unconditional probability
C. Reverse conditional probability (posterior)
D. Intersection of independent events
Discuss

Correct Answer: Option C

Explanation:
Bayes' theorem calculates the posterior probability of a cause given the observed effect, effectively reversing the conditional direction.
This question belongs to: Accountancy and Statistics Statistics
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