Free statistical calculators

Fisher exact probability calculator

  Category 1 Category 2
Group 1
Group 2


When the (two-sided) P-value (the probability of obtaining the observed result or a more extreme result) is less than the conventional 0.05, the conclusion is that there is a significant relationship between the two classification factors Group and Category.


  • Altman DG (1991) Practical statistics for medical research. London: Chapman and Hall.


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