Chi Square Test Definition And Formula. The data used in calculating a chi square statistic must be random raw mutually exclusive drawn. Chi square goodness of fit test.
Null hypothesis the two variables are independent. Alternative hypothesis a variable does not follow a hypothesized distribution. Chi square test of independence.
Where o i is the observed value and e i is the expected value.
It is used to find out how closely actual data fit with expected data. A chi square goodness of fit test uses the following null and alternative hypotheses. Null hypothesis the two variables are independent. The chi square formula is used in the chi square test to compare two statistical data sets.
