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

Question
Life expectancy at birth is calculated using:
A. Age-specific death rates in a life table
B. Crude death rate only
C. Fertility rates
D. Infant mortality rate
Answer: Option A
Solution (By JKSSB Mock Tests)
Life expectancy is derived from a life table that uses age-specific death rates to compute survival probabilities and average remaining lifetime for a hypothetical cohort.
This question belongs to: Accountancy and Statistics Statistics
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Practice More Statistics Questions

Question #1
Which of the following statements about crude birth rate (CBR) is true?
A. CBR is a refined measure of fertility.
B. CBR includes only male births.
C. CBR is affected by the age structure of the population.
D. CBR = (Total births / Total female population) × 1000
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Correct Answer: Option C

Explanation:
CBR uses total population, so age composition influences it.
This question belongs to: Accountancy and Statistics Statistics
Question #2
Age-Specific Fertility Rate for 25-29 years is 120 per 1,000 women. This means:
A. 120 is the total fertility rate contribution from this age group
B. 12% of women aged 25-29 give birth each year
C. Women in this age group have 120 children on average
D. For every 1,000 women aged 25-29, there are 120 live births in a year
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Correct Answer: Option D

Explanation:
ASFR = (Births to women in age group / Women in age group) × 1,000. An ASFR of 120 indicates 120 annual births per 1,000 women aged 25-29, reflecting age-specific fertility intensity.
This question belongs to: Accountancy and Statistics Statistics
Question #3
The weighted harmonic mean is used to average:
A. Prices when expenditures are equal
B. Speeds when distances vary
C. Growth rates
D. Performance ratios when weights are proportional to denominator
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Correct Answer: Option D

Explanation:
Weighted harmonic mean is appropriate when the weights correspond to the denominator of the ratio.
This question belongs to: Accountancy and Statistics Statistics
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