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Regression diagnostic : ウィキペディア英語版
Regression diagnostic

In statistics, a regression diagnostic is one of a set of procedures available for regression analysis that seek to assess the validity of a model in any of a number of different ways.〔 This assessment may be an exploration of the model's underlying statistical assumptions, an examination of the structure of the model by considering formulations that have fewer, more or different explanatory variables, or a study of subgroups of observations, looking for those that are either poorly represented by the model (outliers) or that have a relatively large effect on the regression model's predictions.
A regression diagnostic may take the form of a graphical result, informal quantitative results or a formal statistical hypothesis test,〔 each of which provides guidance for further stages of a regression analysis.
==Introduction==

Regression diagnostics have often been developed or were initially proposed in the context of linear regression or, more particularly, ordinary least squares. This means that many formally defined diagnostics are only available for these contexts.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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