Quantitative Data

• What do bar charts do?

  Compare categories
• What do bar charts use?

  Discontinuous or discrete data (eg blood groups)
• Bar chart rules?


  • Spaces between bars- SHOW DISCONTINUOUS DATA
  • X=axis = the category/IV
  • Y-axis = DV (freq/number)
• What do histograms use?

  continuous data

  eg test scores, time taken
• histogram rules?


  • LEAVE NO spaces between bars (showing continuous data)
  • x-axis = continuous variable
  • y-axis = frequency
• what do scattergrams show?

  the relationship between 2 co-variables
• what do scattergrams allow?

  the presentation of potential correlation
• scattergram rule?


  The co-variables can go on either axes
• histogram bar ruLe?


  bars all the SAME LENGTH (unlike in maths)
• What do pie charts show?

  The frequency or proportion of different categories using percentages
• What do results tables do?

  Summarise the main findingd of the dats

  eg the mean, range, SD
• What graph is used for categories?

  bar chart
• What graph is used for continuous data?

  histogram
• What graph is used for two co-variables/relationshgip?

  scattergram
• MAIN RULES for presenting quantitative data- TITLE ?


  • Have a clear title, showing the IV and DV, OR the 2 co-variables
• MAIN RULES for presenting quantitative data- axis?

  clearly labelled

  operationalised units
• MAIN RULES for presenting quantitative data- plotting?

  Accurate plotting of the data, with suitable scales