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2009 Dec 27
2
Identifying outliers in non-normally distributed data
...n searching for a method for identify outliers for quite some time now. The complication is that I cannot assume that my data is normally distributed nor symmetrical (i.e. some distributions might have one longer tail) so I have not been able to find any good tests. The Walsh's Test (http://www.statistics4u.info/ fundsta...liertest.html#), as I understand assumes that the data is symmetrical for example. Also, while I've found some interesting articles: http://tinyurl.com/yc7w4oq ("Missing Values, Outliers, Robust Statistics & Non-parametric Methods") I don't really know what to...