Flashcards in this deck (40)

• What is data visualisation?

  Representation and presentation of data to facilitate understanding.
  data visualisation
• Who described the main benefit of data visualisation?

  Vitaly Friedman
  data visualisation experts
• What is a key purpose of data visualisation?

  Summarise large quantities of data effectively.
  data purpose
• What can data visualisation help discover?

  Previously unidentified patterns.
  data discovery
• What is a benefit of data visualisation?

  Quickly identify emerging trends.
  data benefits
• What ancient tool is an early example of data visualisation?

  The Abacus.
  history data tools
• How long ago was the Abacus invented?

  Over 2,500 years ago.
  history data
• Who invented the bar chart?

  William Playfair.
  history data charts
• What is static comparison in data visualisation?

  Comparison between categories at a single point in time.
  data comparison
• What type of chart is best for a single category with few items?

  Column chart.
  data charts
• What type of chart is effective for many items in a single category?

  Bar chart.
  data charts
• What does dynamic comparison allow?

  Comparison between categories over time.
  data comparison
• How does the Abacus represent numbers?

  Using beads in columns to show relative quantities.
  history data tools
• What is the minimum denomination in the Abacus example?

  $1.
  history data tools
• How much did Mr Hoo spend on fuel in a month?

  $253.
  history data examples
• What is shown in the line chart?

  Total sales of each product in all stores over four years.
  data_visualisation line_chart
• What does a pie chart represent?

  Relative composition using the size of slices.
  data_visualisation pie_chart
• What do the green bars in a waterfall chart represent?

  Revenue adding to the total.
  data_visualisation waterfall_chart
• What do the red bars in a waterfall chart represent?

  Costs subtracted from the total.
  data_visualisation waterfall_chart
• What does the blue bar in a waterfall chart represent?

  Profit after costs are subtracted from revenues.
  data_visualisation waterfall_chart
• What is dynamic composition in data visualisation?

  Change in composition of data over time.
  data_visualisation dynamic_composition
• What is used for few periods in dynamic composition?

  Stacked bar chart.
  data_visualisation stacked_bar_chart
• What was the total sales in 2017 excluding bakery sales?

  $25 million.
  data_visualisation sales_data
• What does a stacked 100% column chart show?

  Relative differences between categories.
  data_visualisation 100%_column_chart
• What is a scatter plot used for?

  Visualising the relationship between two variables.
  data_visualisation scatter_plot
• What does the x-axis represent in a scatter plot?

  Value of one variable.
  data_visualisation scatter_plot
• What does the y-axis represent in a scatter plot?

  Value of another variable.
  data_visualisation scatter_plot
• What correlation is shown in the barbecue sales scatter diagram?

  Positive correlation with monthly sunshine hours.
  data_visualisation scatter_plot
• What is a 3D scatter chart?

  A scatter chart with a third variable.
  data_visualisation 3d_scatter_chart
• What is a bubble chart?

  A 2D scatter chart where third variable values are represented by bubble size.
  data_visualisation bubble_chart
• What is a problem with bubble charts?

  Difficulty in comparing bubble dimensions in absolute terms.
  data_visualisation bubble_chart
• What feature can help interpret bubble charts?

  Adding a key for relative bubble sizes.
  data_visualisation bubble_chart
• What does the bubble chart show regarding advertising spend?

  Greater spend correlates with greater quarterly sales.
  data_visualisation bubble_chart
• What qualities should a good data visualisation have according to Andy Kirk?

  Trustworthy, accessible, elegant.
  data_visualisation qualities
• What does Edward R. Tufte describe as an effective visualisation?

  Well-designed presentation of interesting data.
  data_visualisation tufte
• What is the main focus of graphical excellence?

  Substance and statistical integrity.
  data_visualisation excellence
• Who described effective visualisation in graphical excellence?

  Edward R. Tufte
  visualization statistics
• What is the focus of a well-designed presentation according to Tufte?

  Interesting data
  visualization data
• What does Tufte emphasize in effective visualisation?

  Substance
  visualization substance
• What does Tufte consider important in graphical excellence?

  Statistical matter
  visualization statistics