Construct · 1 fields · 2 citations

outlier: a standalone construct

One name. One construct. A landmark on the map.

● anchor · a standalone construct Nearest construct by meaninganomalycompare the meanings
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outlier1 CONSTRUCTStatistical outlierGRUBBS · OUTLYING VALUE

A single standalone construct; nearby constructs are located against it in the Collider. Tap a field for its definition, unit, and measures.

Statistics

an observation lying at an abnormal distance from the other values in a sample, possibly from a different population.

An observation in a sample that lies at an abnormal distance from the other values, far enough to suggest it may not belong to the same population or process as the rest. Grubbs's 1969 Procedures for detecting outlying observations in samples laid out formal tests for flagging such a value, and Hawkins's 1980 Identification of outliers gave the classic reading of one as a point so deviant that it appears to have been generated by a different mechanism. The referent is a single number in a dataset, judged by how far it sits from the bulk of the data, not a remarkable human being or a body of rock left standing after erosion.[1][2]

Unit
One observation, scaled by its distance from the rest in standard deviations or a robust spread
Recovery means
Not applicable
Measured by
Flagged by formal tests such as Grubbs's test, or by robust distances and influence measures like leverage

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Nearby constructs

leverage6 fields · 15 citationsjingle · one name, six constructstail2 fields · 2 citationsjingle · one word, two constructsdeviation4 fields · 5 citationsjingle · one word, four constructsanomaly4 fields · 7 citationsjingle · one word, four constructs

References

  1. Grubbs, F. E. (1969). Procedures for detecting outlying observations in samples. Technometrics, 11(1), 1–21. https://doi.org/10.1080/00401706.1969.10490657
  2. Hawkins, D. M. (1980). Identification of outliers. Chapman and Hall. https://doi.org/10.1007/978-94-015-3994-4

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