Crude birth rate is crude because: MCQ with Answer and Explanation

Question
Crude birth rate is crude because:
A. It is based on sample
B. It does not account for age-sex composition of the population
C. It is always wrong
D. It uses only male births
Answer: Option B
Solution (By JKSSB Mock Tests)
The denominator is total population, not the population at risk (women 15-49).
This question belongs to: Accountancy and Statistics Statistics
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Practice More Statistics Questions

Question #1
The total population of a country at a given time is essentially affected by:
A. Fertility only
B. Mortality only
C. Migration only
D. Fertility, Mortality, and Migration
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Correct Answer: Option D

Explanation:
These three components are the only demographic variables that determine changes in population size.
This question belongs to: Accountancy and Statistics Statistics
Question #2
Life expectancy at age 65 being higher than at birth indicates:
A. Improving healthcare for the elderly
B. High infant and child mortality pulling down life expectancy at birth
C. Data error in life table construction
D. Migration of elderly into the population
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Correct Answer: Option B

Explanation:
Life expectancy at birth is heavily influenced by early-life mortality; if many children die young, e₀ is low, but those surviving to 65 have already passed high-risk ages, so e₆₅ is naturally higher.
This question belongs to: Accountancy and Statistics Statistics
Question #3
Two events A and B are such that P(A)=0.5, P(B)=0.3, P(A∩B)=0.1. They are:
A. Independent
B. Neither mutually exclusive nor independent
C. Mutually exclusive
D. Both mutually exclusive and independent
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Correct Answer: Option B

Explanation:
P(A∩B)≠0 ⇒ not mutually exclusive. P(A)P(B)=0.15 ≠ 0.1 ⇒ not independent.
This question belongs to: Accountancy and Statistics Statistics
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