Changes

*Normally categorical data's may displayed in tables. The <math>\chi^2</math> static used to compare the observed value in each table to the value which would be the expected  under the assumption.  

*Normally categorical data's may displayed in tables. The <math>\chi^2</math> static used to compare the observed value in each table to the value which would be the expected  under the assumption.  

*The conditions of <math>\chi^2</math> test is  

*The conditions of <math>\chi^2</math> test is  

**The table should be 2x2 or more than 2x2

#The table should be 2x2 or more than 2x2

**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>