5. Data Analysis - Graphs

• 1. Data Analysis - Graphs

  Bar Charts:

  • Data in categories = comparison.
  • Categories on x-axis + columns of bar charts same width, separated by space.
  • Spaces show variable on x-axis not continuous.
  • Shows totals, means, percentages or ratios + can also display 2 values together.
• 2. Data Analysis - Graphs

  Histograms:

  • Similar to bar charts, but shows continuous data, like test scores.
  • Continuous scores placed x-axis; frequency of scores shown on y-axis.
  • No spaces between bars sine data continuous.
• 3. Data Analysis - Graphs

  Line Graphs:

  • Similar to histograms, continuous data (x-axes).
  • Drawing line from mid-point top of each bar in histogram.
  • Advantage of frequency polygon is that 2 or more frequency distributions can be compared on same graph.
• 4. Data Analysis - Graphs

  Pie Charts:

  • Show frequency of categories as %.
  • Split into sections, representative of frequency of category.
  • Sections colour coded + % score.
• 5. Data Analysis - Graphs

  Scattergrams (Correlations):

  • Display 2 sets data to see if relationship/connection.