2x2 Contingency Table Chi Square Test. There are three ways to compute a p value from a contingency table. Fisher s test is the best choice as it always gives the exact p value while the chi square test only calculates an approximate p value.
The contingency chi square is based on the same principles as the simple chi square analysis in which we examine the expected vs. The 2x2 contingency chi square is used for the comparison of two groups with a dichotomous dependent variable. 2 x 2 contingency chi square.
Observations must be independent of each other so for example no matched pairs cell count must be 5 or above for each cell in a 2 x 2 contingency table.
Fisher s test is the best choice as it always gives the exact p value while the chi square test only calculates an approximate p value. 2 x 2 contingency chi square. Observations must be independent of each other so for example no matched pairs cell count must be 5 or above for each cell in a 2 x 2 contingency table. There are three ways to compute a p value from a contingency table.
