Sunday, October 11, 2020

When I do K-Wallis test, it divides one of my factorial categorical variable into 2 (picture attached) What could possibly be the reason?

In this picture I have 4 different groups of cocaine use (IV, ingestion, nasal, smoke). Why smoke (smoking cocaine) gets divided into 2? Also which p-value am I supposed to use? The one with ties or the one WITHOUT?

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