Quantitative data representations

• what is a scattergram?

  represents the strength and the direction of the relationship between co-variables in correlational analysis
• what is a bar chart and when is it used?

  the frequency of each variable is represented by the height of bars

  used when data is in categories —> discrete data
• what is a histogram and when is it used?

  Shows frequency

  the x-axis must start at true zero

  scale is continuous

  Used when data is continuous