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What is the most appropriate precaution when time intervals are unequal in population-growth data?

Answer and explanation

Correct answer: Convert growth into an annual rate or use the same time basis for comparison

The direct answer is C. Suppose one region’s increase is measured over five years and another’s over ten years. Their absolute increases cannot be compared fairly without considering the length of time. Converting the change into an annual rate, or selecting equal time periods, creates a common basis. The calculation may use change divided by time for a simple average rate; the important idea is to account for the unequal interval. Option A is wrong because equal-looking totals may represent different speeds. Option B ignores the amount and timing of change. Option D is wrong because births and migration are real causes of population change and should be analysed, not erased. Memory cue: unequal periods require a common time base.

Related tags

Time IntervalAnnual Growth RatePopulation ComparisonData InterpretationPopulation GrowthPopulationGeographyClass 9 Mcq

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