different between inlier vs outlier

English

in +? lier

inlier (plural inliers)

(geology) An area of older rocks surrounded by younger rocks, typically formed by erosion of part of the younger rock.
(statistics) A value that fits a pattern, rather than being an outlier.

From outlie +? -er

outlier (plural outliers)

A person or thing situated away from the main body or outside its proper place.
(geology) A part of a formation separated from the rest of the formation by erosion.
(statistics) A value in a statistical sample which does not fit a pattern that describes most other data points; specifically, a value that lies 1.5 IQR beyond the upper or lower quartile.

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