❝ Here you err!
Not the first and not the last time. I stand corrected!
❝ To account for period effects you have to apply the Wilcoxon–Mann–Whitney test with sequence as grouping factor if you evaluate a 2x2 cross-over design. This test is sometimes also called Hauschke test. Guess why .
Right. Part of the title of Steinijans & Hauschke* says it all.
Unlike the nonparametric confidence interval according to Steinijans and Diletti , the nonparametric approach by Hauschke et al.  is no longer limited by the assumption of equal period effects. Although, according to our vast experience, unequal period effects are extremely rare, they may result in a biased point estimate and an unnecessarily wide confidence interval if the procedure assuming equal period effects is applied incorrectly. To avoid this, the nonparametric procedure by Steinijans and Diletti  should generally be replaced by that of Hauschke et al. .
Dif-tor heh smusma 🖖🏼 Довге життя Україна!
The quality of responses received is directly proportional to the quality of the question asked. 🚮
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