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

Life expectancy at birth is best interpreted as:
A. The maximum age reached by any individual in the population
B. The age by which 50% of the population has died
C. The median age at death in a given year
D. The average number of years a newborn is expected to live if current mortality patterns persist
Answer: Option D
Solution (By JKSSB Mock Tests)
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.

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Statistics Questions

Question #1
The concept of 'conditional probability' is needed when:
A. We sum probabilities
B. Events are independent
C. We want the probability of an event given that another event has already occurred
D. Events are mutually exclusive

Correct Answer: Option C


Explanation:
Conditional probability deals with the updated probability after knowing another event has occurred.

This question belongs to: Accountancy and Statistics Statistics
Question #2
The term 'demographic transition' refers to:
A. Shift from high birth and death rates to low birth and death rates
B. Migration from rural to urban areas
C. Change in age structure only
D. Increase in population density

Correct Answer: Option A


Explanation:
Demographic transition is the historical shift from high fertility/mortality to low fertility/mortality.

This question belongs to: Accountancy and Statistics Statistics
Question #3
In Bayes' theorem, the initial probabilities before observing evidence are called:
A. Marginal probabilities
B. Likelihoods
C. Prior probabilities
D. Posterior probabilities

Correct Answer: Option C


Explanation:
Prior probabilities represent the initial degree of belief.

This question belongs to: Accountancy and Statistics Statistics