permutation test
时间: 2023-09-16 15:08:20 浏览: 51
A permutation test is a statistical method for testing the significance of an observed effect or difference between two or more groups. It involves creating all possible permutations of the data and calculating the test statistic for each permutation. The probability of observing a test statistic as extreme as the one observed under the null hypothesis is then estimated by the proportion of permutations that produce a test statistic as extreme or more extreme than the observed one. The permutation test is a nonparametric alternative to traditional parametric tests such as t-tests or ANOVA, and is particularly useful when the assumptions of these tests are violated, such as when the data are not normally distributed or when the variances of the groups are not equal.