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7899760 
Journal Article 
Procedures for Detecting Outlying Observations in Samples 
Grubbs, FE 
1969 
1 
Technometrics
ISSN: 0040-1706
EISSN: 1537-2723 
11 
1 
1-21 
English 
Procedures are given for determining statistically whether the highest observation, the lowest observation, the highest and lowest observations, the two highest observations, the two lowest observations, or more of the observations in the sample are statistical outliers. Both the statistical formulae and the application of the procedures to examples are given, thus representing a rather complete treatment of tests for outliers in single samples. This paper has been prepared primarily as an expository and tutorial article on the problem of detecting outlying observations in much experimental work. We cover only tests of significance in thii paper. © 1969 Taylor & Francis Group, LLC.