The exact distribution of the Wilcoxon rank sum,W,will not change much in the presence of many tied observations.

Name: The exact distribution of the Wilcoxon rank sum,W,will not change much in the presence of many tied observations.
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The presence of many tied observations in the data can affect the distribution of the Wilcoxon rank sum, W, because ties reduce the number of possible ranks and alter the ranking process, potentially impacting the test's accuracy and interpretation.

The Exact Distribution of the Wilcoxon Rank Sum,W,will Not Change