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Which option shows a data error when comparing growth rates?

Answer and explanation

Correct answer: Directly comparing data from different time periods and different definitions

The direct answer is A. A growth-rate comparison is meaningful only when the figures are comparable. First check that the data cover the same length and dates of time. Next check that the same population definition, area and method has been used. If figures from different periods or different definitions are compared directly, the difference may reflect the method or time span rather than a real difference in growth. Therefore, option A describes a data error. Option B is a sound practice because the same period and definition improve comparability. Option C is also correct practice: percentage growth and absolute numerical increase answer different questions and should not be confused. Option D is important because a small population can show a high percentage increase even when its numerical increase is small, while a large population can add many people with a lower percentage rate. Memory cue: before comparing rates, check the year, definition, area and base population.

Related tags

Population GrowthGrowth RateData ComparisonPopulation StatisticsPopulationGeographyClass 9 Mcq

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