There is an empirical rule performing a $\chi^2$ test for goodness of fit: the expected frequencies have all to be greater then or equal to 5. Does someone knows why? Is there any proof?
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.
Here's how it works:
- Anybody can ask a question
- Anybody can answer
- The best answers are voted up and rise to the top