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Cambridge IGCSE Statistics practice

When drawing conclusions about populations, why is it important to consider whether rates are crude or standardised?

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MCQ

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cambridge_mcq

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Topic

Crude and standardised rates

Exam-style question

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When drawing conclusions about populations, why is it important to consider whether rates are crude or standardised?.

  1. A.Because crude rates are always more accurate
  2. B.Because standardised rates ignore real differences
  3. C.Because the choice affects the fairness and accuracy of comparisons
  4. D.Because only crude rates can be used for conclusions

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Paper 1 structured question: Crude and standardised rates

Paper 1Statistical Techniques3 marks

Description

Disease Rates in Two Towns

Crude rates: Town A = 5 per 1000, Town B = 8 per 1000 Standardised rates: Town A = 6 per 1000, Town B = 6 per 1000

TownCrude RateStandardised Rate
Town A56
Town B86
  1. a

    Comment Comment on the difference between the crude rates and the standardised rates for Town A and Town B.

    Aim for approximately 3 distinct marking points.

    [3]