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A distribution is a mathematical description of probabilities or frequencies.

2 votes
Accepted

How to calculate confidence interval when data is nominal?

The sample size is so small that creating a 95% (or 99%, for what matters) confidence interval is practically almost irrelevant, so you could easily disregard what follows, if you want really to infor …
Giuseppe Biondi-Zoccai's user avatar
1 vote

Looking for the right statistical test. - Wilcoxon signed-rank test?

It is not 100% clear what you need, but an overall Friedman test, followed by pairwise Wilcoxon tests, the latter with with multiplicity adjustment (eg with Bonferroni correction), could be a reasonab …
Giuseppe Biondi-Zoccai's user avatar