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Cambridge IGCSE Statistics practice

Paper 1 structured question: Bivariate distributions

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Attempt questionBivariate distributions revisionRevise the key idea

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Bivariate distributions

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Paper 1Statistical Techniques2 marks

A student investigates how the amount of water given to a plant affects its height after two weeks.

Description

Plant Growth Investigation

The student varies the amount of water given to identical plants and measures their height after two weeks.

Amount of water (ml)Plant height (cm)
5012
10015
15018
20020
  1. a

    Identify the independent variable in this investigation.

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    Identify the dependent variable in this investigation.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 1 structured question: Bivariate distributions

Paper 1Statistical Techniques2 marks

Description

Study Time and Test Scores

Students study for different lengths of time and their test scores are recorded.

Study time (hours)Test score (%)
160
270
380
485
  1. a

    State the independent variable in this study.

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    State the dependent variable in this study.

    Aim for approximately 1 distinct marking point.

    [1]