Improving the reporting of P-values generated by randomization methods
- We increasingly calculate P-values using randomization approaches.
- Often, it is not possible to consider full evaluation of all possible samples (e.g. permutations or bootstraps) in order to get an exact P-value, so an approximate P-value is calculated across a random sample of these possible samples.
- We provide methods that allow the uncertainty introduced by this approximation to be compactly and clearly presented.
- If the recommendations proposed here are adopted, then reviewers and readers of the increasing number of publications using these approaches will be better informed.