Example 7.16: assess robustness of permutation test to violations of exchangeability assumption
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Permutation tests (section 2.4.3) are a form of resampling based inference that can be used to compare two groups. A simple univariate two-group permutation test requires that the group labels for the observations are exchangeable under the null hypothesis of equal distributions, but allows relaxation of specific distributional assumptions required by parametric procedures such as the t-test (Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.
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