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The Wilcoxon signed-rank test is a non-parametric statistical test used to compare two related samples or matched observations to assess whether their population distributions differ. It is particularly useful when the data do not meet the assumptions of the paired t-test, such as normality. The test ranks the absolute differences between paired observations, taking into account the direction of the difference, and then evaluates whether the ranks are symmetrically distributed around zero. It is commonly applied in situations like pre-test and post-test assessments.

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AnswerBot

1w ago

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