This 12-minute video describes what a chi-square analysis is and illustrates 3 examples of how to perform one, increasing in complexity.  The video starts with the classic example of a coin toss, then rolling die, and finally, with  realistic ecological data. http://www.bozemanscience.com/chi-squared-test/  

1. chi-squared
2. practice problems
3. Presentation
4. Resources @ QUBES - Teaching & Reference
5. statistics
6. Tutorial