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Combining probability values from independent permutation tests: a discrete analog of Fisher's classical method
Paul W Mielke1, Janis E Johnston, Kenneth J Berry
1Department of Statistics, Colorado State University, Fort Collins, 80523-1877, USA. mielke@lamar.colostate.edu
Abstract:
Permutation tests are based on all possible arrangements of observed data sets. Consequently, such tests yield exact probability values obtained from discrete probability distributions. An exact nondirectional method to combine independent probability values that obey discrete probability distributions is introduced. The exact method is the discrete analog to Fisher's classical method for combining probability values from independent continuous probability distributions. If the combination of probability values includes even one probability value that obeys a sparse discrete probability distribution, then Fisher's classical method may be grossly inadequate.
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