Keywords: outliers, unusual observations
The story of the how the hole in the Antarctic ozone layer was first discovered, and why it wasn't discovered earlier, is often used as a cautionary tale regarding the treatment of outliers and unusual observations. The cited article below gives some interesting and hard-to-find background to the story.
This example is a story rather than a data set. Read the article by Pukelsheim (1990) below.
|Pukelsheim, F. (1990). Robustness of statistical gossip and the Antarctic ozone hole. Institute of Mathematical Statistics Bulletin 19, 540-542. (Read 540, 541, 542).|
|The images of the article were downloaded from Friedrich Pukelsheim's personal www site.|