Quantitative Data

• What is one way of representing quantitative data?

  Summarising data in a table
• How is data usually presented in a table?

  Data is converted into descriptive statistics
• What does a table showing the mean and mode of scores represent?

  • Mean: Average score
  • Mode: Most frequently occurring score
  • Example: Memory test scores for Condition A and B
• What is the purpose of bar charts in data representation?

  To allow differences in data to be seen more clearly
• What type of data do bar charts represent?

  Discrete data
• How are the bars in a bar chart arranged?

  The bars do not touch each other
• What is plotted on the y-axis of a bar chart?

  The amount of frequency for each category
• What is plotted on the x-axis of a bar chart?

  The categories of data
• How do histograms differ from bar charts?

  In histograms, the bars touch each other
• What type of data do histograms represent?

  Continuous data
• How is the x-axis arranged in a histogram?

  It has equal sized intervals of one category
• What does the y-axis in a histogram represent?

  The frequency of scores
• What is the purpose of line graphs in data representation?

  To show the change of values over time
• How are points represented in line graphs?

  Points are connected by lines
• What is plotted on the x-axis of a line graph?

  The independent variable (IV)
• What is plotted on the y-axis of a line graph?

  The dependent variable (DV)
• What are the key differences between bar charts, histograms, and line graphs?

  • Bar Charts:
  • Represent discrete data
  • Bars do not touch
  • Histograms:
  • Represent continuous data
  • Bars touch each other
  • Line Graphs:
  • Represent continuous data
  • Points connected by lines