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Under which condition is a comparison of decadal population growth scientifically valid?

Answer and explanation

Correct answer: Population data for both areas cover the same ten-year period

Correct answer: A. Decadal growth means population change over a ten-year period. To compare two areas scientifically, both figures should refer to the same ten-year interval and comparable territorial units. This keeps the length of time and the area being measured consistent. Option A is correct because equal periods make the comparison meaningful. Option B is wrong because five-year and ten-year changes are not directly comparable as decadal growth. Option C is wrong because an unadjusted boundary change may include or exclude people and distort the result. Option D is wrong because different census years may reflect different time intervals and conditions. A useful check is: same time period, same or adjusted boundaries, and comparable data definitions.

Related tags

Decadal GrowthCensus DataPopulation ComparisonTime PeriodPopulation GrowthPopulationGeographyClass 9 Mcq

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