Changes

**Each observations should not be dependent

**Each observations should not be dependent

**All expected values should be 10 or greater. 

**All expected values should be 10 or greater. 

**The test statistic is:  

**The test statistic is: <math>\chi^2=\sum\frac{(Oi-Ei)^2}{Ei}</math>

<math>\chi^2=\sum\frac{(Oi-Ei)^2}{Ei}</math>

The degrees of freedom are: (r–1)(c–1)

The degrees of freedom are: (r–1)(c–1)