Interpretation and display of quantitive data

• What is the purpose of scatter diagrams?

  To display correlation
• How are co-variables represented in a scatter diagram?

  One on the x-axis, the other on the y-axis
• What does a dot in a scatter diagram represent?

  Where co-variables meet
• What does frequency mean in data analysis?

  The number of times it occurs
• What is the structure of frequency tables?

  Organised in rows and columns
• What is a histogram?

  A frequency diagram with continuous categories
• How are bars arranged in a histogram?

  No spaces between bars
• What is a bar chart?

  Bars can be in any order
• What characterizes a normal distribution?

  Symmetrical spread forming a bell shape
• Where do the mean, median, and mode lie in a normal distribution?

  At the peak of the bell shape
• What are the key features of frequency diagrams?

  • Histogram: Continuous categories, no spaces between bars
  • Bar chart: Bars can be in any order
• How do scatter diagrams and frequency tables differ in data representation?

  • Scatter diagrams: Show correlation between two variables
  • Frequency tables: Organize data systematically in rows and columns