STATISTICAL APPLICATIONS FOR PATIENT ORIENTED PRIMARY HEALTHCARE RESEARCH
|Fisher's Exact Test|
The equation below is the basic equation for the chi square two by two test.
Use the Chi square Webulator to enter your data and compute the Chi square observed score.
The computed score is referred to as
the chi-square observed. After computing the chi-square for the observed scores
we next determine the chi-square critical score which represents the chi-square for
the expected population.
degrees of freedom = (number of rows - 1) x (number of columns -1)
degrees of freedom = (2-1) x (2-1)
degrees of freedom = (1) x (1)
degrees of freedom = 1
and the "chi-square critical value for degrees of freedom of "1at p<0.05 = 3.84
However we could also compute the exact probability using the Fisher's Exact test. The elements of the numerator are:
After we compute the factorial terms we can compute the numerator and denominator terms and then compute the Fisher's Exact Probability value.
Click here to return to the Webulator Menu Page
For more information, please contact:
Professor William J. Montelpare, Ph.D.,