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Local regression — LOESS, or locally weighted scatterplot smoothing, is one of many modern modeling methods that build on classical methods, such as linear and nonlinear least squares regression. Modern regression methods are designed to address situations in which … Wikipedia
outlier effects — The pattern created in a sample by the inclusion of a few atypical cases or groups. For example, if one finds that data from twenty different schools show there has been an overall decrease in the ratio of staff to students, it will be necessary… … Dictionary of sociology

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