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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 Techniques4 marks

Two countries, Country X and Country Y, have different crude mortality rates from a certain disease. Country X has a crude mortality rate of 12 per 1000, and Country Y has a crude mortality rate of 9 per 1000. After standardising for age, the mortality rates are 10 per 1000 for Country X and 11 per 1000 for Country Y.

Description

Mortality Rates in Two Countries

Crude mortality rates: Country X = 12 per 1000, Country Y = 9 per 1000 Standardised mortality rates: Country X = 10 per 1000, Country Y = 11 per 1000

CountryCrude Mortality RateStandardised Mortality Rate
Country X1210
Country Y911
  1. a

    Explain Explain what the difference between the crude and standardised mortality rates suggests about the populations of Country X and Country Y.

    Aim for approximately 4 distinct marking points.

    [4]

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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]