Presentation of Quantitative Data

• What is one way to describe data visually?

  Graphs
• What is the benefit of using graphs for data presentation?

  They allow quick visual conclusions
• What are the ways to present quantitative data?

  1. Bar Charts
  2. Histograms
  3. Scattergrams
  4. Tables
• What does the height of a bar in a bar chart represent?

  Frequency
• What does the width of a bar in a bar chart represent?

  Different categories
• How is data represented on the X axis of a bar chart?

  As separate categories
• What is a key feature of a histogram compared to a bar chart?

  The bars touch each other
• What type of data is represented on the X axis of a histogram?

  Continuous data
• If a histogram shows time taken to complete a task, what does it measure?

  Duration in seconds
• What is a scattergram used for?

  Correlations
• Does it matter which axes are used for co-variables in a scattergram?

  No, it does not matter
• What is a simple way to present data?

  Tables
• What elements do examiners look for in a graph?

  • Title
  • Axes labelled and scaled appropriately
  • Accuracy
  • Correct choice of graph
• What should you be prepared to do in exams regarding graphs?

  Draw and interpret graphs
• How does a bar chart differ from a histogram in terms of data continuity?

  Bar charts have separate categories, histograms do not
• What does the absence of gaps in a histogram indicate?

  Continuous data
• What type of data might be represented in a histogram?

  Seconds, meters, scores, kilograms
• If you need to show the frequency of different categories, which graph would you use?

  Bar chart
• What is the primary distinction between a bar chart and a histogram?

  Bar charts represent discrete categories, histograms represent continuous data