A. Compare mortality between populations with different age structures
B. Estimate infant mortality from census data
C. Adjust birth rates for underreporting
D. Calculate crude death rates for small areas
Answer: Option A
Solution (By JKSSB Mock Tests)
SDR applies age-specific death rates of a population to a standard age distribution, eliminating the confounding effect of age structure to enable fair mortality comparisons across regions or time.
Explanation:
Consistency requires that all derived class frequencies (including ultimate classes) are non-negative, as negative counts are logically impossible in real-world data.
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