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Data Recording, Analysis and Presentation

Percentages, fractions, ratios and graphs

  • 3 things to know
  • Component 01

Overview

Recall questions on expressing results as percentages, fractions and ratios, frequency tables, choosing line graphs, pie charts, bar charts, histograms and scatter diagrams, and calculating a pie chart angle.

What you need to know

Answer each one before you reveal it.

Your recallNot started
Study

In a study, 45 participants conformed and 15 did not. State the ratio of conformers to non-conformers in its simplest form.

Key term

A researcher has the mean number of errors made by four separate groups. State which form of display is appropriate and why.

Key term

What is a frequency table used for?

Questions from this subtopic

Each one with the model answer underneath.

  1. 1

    In a sample of 40 participants, 12 gave the same incorrect answer. Express this as a percentage.

    Model answer

    It is 30% of the sample.

  2. 2

    Express 18 out of 24 as a fraction in its simplest form.

    Model answer

    It is 3/4.

  3. 3

    In a study, 45 participants conformed and 15 did not. State the ratio of conformers to non-conformers in its simplest form.

    Model answer

    The ratio is 3:1.

  4. 4

    What is a frequency table used for?

    Model answer

    Recording how many times each score or category occurs in a set of data, usually by tallying.

  5. 5

    When is a line graph the appropriate form of display?

    Model answer

    When showing how a variable changes continuously, for example across successive trials or over time.

  6. 6

    When is a pie chart the appropriate form of display?

    Model answer

    When showing how a total divides into proportions, with each slice representing a share of the whole.

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