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There is no standard definition.

If Q1 is the lower quartile and Q3 the upper quartile of a set of observations, then the inter quartile range (IQR) is Q3 - Q1.


Outliers may be defined as values which are smaller than Q1 - k*(IQR) or larger than Q3 + k*IQR where k is some non-negative real number.


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8y ago
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12y ago

An outlier, in statistics, is an observation that is way too large or too small compared with the other observations.

There are various methods of identifying outliers: these can vary according to the nature (skewness) of the underlying distribution of the data.

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8y ago

a number that is distant from most of the other numbers in a list of data

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Q: What is math outlier?
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