Confusing Pie Chart

A former student sent me this chart, and he didn’t have a source, but it’s a good example of what not to do when creating pie charts. What problems can you identify?

Pie.jpg

Discussion:

  • What principles of creating pie charts are followed, and how does the chart fall short?

  • Is the pie chart the best choice for this data? What would be a better choice and why?

  • What does the text imply?