| 1. | This form of conditioning is also the basis for Fisher's exact test.
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| 2. | The critical thing here is that you very rarely need an exact test.
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| 3. | An important theoretical contribution was his 1935 paper on " Fisher's exact test ".
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| 4. | Tseng's software for matching has similarly been used in nonparametric statistics to implement exact tests.
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| 5. | Using an exact test, this is calculated as
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| 6. | Assuming you sampled without replacement, you'd need to use the hypergeometric distribution to do an exact test.
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| 7. | Both tests have sizes less than or equal to the uniformly more powerful than Fisher's exact test.
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| 8. | You should ideally use an exact test instead, or a simpler method like the Wilson score test.
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| 9. | An example of the Fisher Exact Test used on a 2 ?3 matrix is provided here.
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| 10. | As is typical for Fisher's exact test for small samples, the gradation of significance levels is quite coarse.
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