presentation of quantitative data

• Summarising data in a table is one way of representing data
• Bar charts allow for differences in data to be seen more clearly and are used for discrete data
• Summarising data in a table

  Usually not in the form of raw scores but the data has been converted into descriptive statistics
• Bar Charts

  • Used for discrete data, which describes data that has been divided into categories
  • The bars do not touch each other which shows that we are dealing with separate conditions
  • The amount of frequency for each category is plotted on the y-axis (vertical axis) whilst the categories (below these are condition A and B) are plotted on the x-axis (horizontal axis)
• Histograms

  • Used for continuous data
  • The bars touch each other
  • The x-axis has equal sized intervals of one category whilst the y-axis represents the frequency
• Line graphs

  • Used for continuous data
  • Points are connected by lines to show the change of values
  • The IV is plotted on the x-axis while the DV is plotted on the y-axis
• Scattergrams


  • Used to show associations between co-variables
  • Either of the co-variables can occupy the x-axis or the y-axis
  • Each point displayed on the graph coincides with the x and y position of the co-variables