Outliers in biometrical data: What's old, What's new
International Journal of Biometrics
Outliers in some Faces and non-Faces data
International Journal of Biometrics
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The problem of finding and identifying outliers in multivariate measurement data is as old as the data analysis itself. The question: "what is an outlier" has many answers, is is especially difficult when considering high-dimensional data. In the paper a search for outliers in two real data sets is shown. It is stressed that identifying outliers should not be done on the basis of asymptotical cutoffs derived under assumption of normality of the analyzed data.