Tag Archives: circle graphs

Even Great Presentations Have Their Moments….

Recently, I attended a talk where the circle graph below was used to help emphasize the many online tools our students utilize.  To be fair, the presentation was otherwise fantastic, but sometimes my stats-abuse-radar is on full alert.  Use it as an opener for class discussion, and see if your students notice the inherent problem with this graph:

Photobucket

Some questions for a class discussion:

  • Does this graph portray the data accurately?
  • Is a circle graph appropriate here? Why or why not?
  • How can we re-display the same information effectively using a new circle grpah, or a different type of graph?

In moments like this, sometimes it is best to draw energy from inspirational quotes.  I leave you with this, from the Simpsons:

Hypnotist: You are all very good players
Team: We are all very good players.
Hypnotist: You will beat Shelbyville.
Team: We will beat Shelbyville.
Hypnotist: You will give 110 percent.
Team: That’s impossible no one can give more than 100 percent. By definition that’s the most any one can give.
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