Life expectancy at birth increased from 60 to 65 years. This indicates: MCQ with Answer and Explanation

Life expectancy at birth increased from 60 to 65 years. This indicates:
A. Everyone will live 5 years longer
B. A newborn today is expected to live 5 years longer on average than a newborn in the past, assuming current mortality rates
C. The oldest person will live to 65
D. Mortality has decreased only for the elderly
Answer: Option B
Solution (By JKSSB Mock Tests)
Life expectancy is a period measure reflecting current mortality conditions; an increase means improved survival across ages, raising the average projected lifespan for new births under present rates.

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Practice More Statistics Questions

Question #1
In a frequency distribution, the modal class is the class with:
A. Highest class mark
B. Largest class interval
C. Highest frequency
D. Median value

Correct Answer: Option C


Explanation:
The mode is the most frequent value; the modal class is the interval with the maximum frequency.

This question belongs to: Accountancy and Statistics Statistics
Question #2
Vital statistics from civil registration are superior to survey estimates for:
A. Timely monitoring of recent changes
B. Long-term trend analysis
C. All of the above
D. Small area estimation

Correct Answer: Option C


Explanation:
Well-functioning civil registration provides continuous, complete, and timely data, enabling accurate trend analysis, real-time monitoring, and small-area estimates, unlike periodic surveys with sampling error and recall bias.

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Question #3
If a population has a high proportion of young people, the crude death rate may be low even if age-specific rates are high. This is an example of:
A. Sampling error
B. Age structure effect
C. Reverse causality
D. Direct standardization

Correct Answer: Option B


Explanation:
A young population has fewer old people where mortality is high, thus CDR can be low.

This question belongs to: Accountancy and Statistics Statistics