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In which condition will comparison of natural increase be misleading?

Answer and explanation

Correct answer: The data for one area cover five years and those for the other cover ten years

Direct answer: B, when one area's data cover five years and the other's cover ten years. Natural increase depends on births and deaths during a specified period, so comparisons are fair only when the time period and measurement basis are comparable. If one total is collected for five years and the other for ten years, the second figure has had twice as much time to accumulate. A larger total may therefore reflect the longer period rather than a genuinely higher rate of population change. A is a suitable condition because equal periods support comparison. C improves the quality of the data because both vital events are included, although their periods must still match. D is also helpful because clear boundaries ensure that the areas are being identified consistently. None of these creates the same problem as unequal time spans. Memory cue: before comparing population figures, check time, area, units, and whether the same events were counted.

Related tags

Natural IncreasePopulation ComparisonTime PeriodBirth RateDeath RateProcesses Of Population ChangePopulationGeography

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