Explanation:
TFR is a period measure summing ASFRs across all reproductive ages (typically 15-49), estimating the average completed family size if current fertility patterns persist, crucial for population projections.
Explanation:
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:
Life expectancy is derived from life tables constructed using age-specific death rates, which rely on vital statistics data on deaths and population by age.
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