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Cambridge IGCSE Statistics practice

Paper 1 structured question: Crude and standardised rates

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Crude and standardised rates

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Paper 1Statistical Techniques2 marks

Health officials want to compare disease rates between two cities with different population age profiles.

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Disease Rates in Two Cities

City X has a crude disease rate of 8 cases per 1000 people. City Y has a crude disease rate of 10 cases per 1000 people. City Y has a younger population compared to City X.

  1. a

    Calculate State why calculating a standardised disease rate is necessary before comparing the two cities.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 1 structured question: Crude and standardised rates

Paper 1Statistical Techniques3 marks

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Mortality Rates in Two Regions

Region A has a crude mortality rate of 12 deaths per 1000 people. Region B has a crude mortality rate of 15 deaths per 1000 people. However, Region B has a much older population than Region A.

  1. a

    Explain Explain why calculating a standardised mortality rate is important when comparing these two regions.

    Aim for approximately 3 distinct marking points.

    [3]