What is the Probability of Being Attacked by a Shark?

http://www.flmnh.ufl.edu/fish/Sharks/ISAF/ISAF.htm

The International Shark Attack File provides many interesting statistics about shark attacks. Worldwide 2002 statistics are reported on the incidence of shark attack, the probability of attack, and the likelihood of survival after an attack.

Comparing the Mean and the Median

http://www.mste.uiuc.edu/hill/dstat/centtendtest3.html

This website uses graphs to illustrate the difference between the mean and median.