Unmasking test for multiple upper or lower outliers in normal samples

Jin Zhang and Xueren Wang

Journal of Applied Statistics, 1998, vol. 25, issue 2, 257-261

Abstract: The discordancy test for multiple outliers is complicated by problems of masking and swamping. The key to the settlement of the question lies in the determination of k , i.e. the number of 'contaminants' in a sample. Great efforts have been made to solve this problem in recent years, but no effective method has been developed. In this paper, we present two ways of determining k , free from the effects of masking and swamping, when testing upper (lower) outliers in normal samples. Examples are given to illustrate the methods.

Date: 1998
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DOI: 10.1080/02664769823241

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