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@mapami

AWS Certified AI Practitioner（AIF）対策：決定係数R²

Last updated at Posted at 2024-12-05

決定係数R²

回帰分析において、

『モデルが予測に対して、どれだけデータの変動を説明できているかを測る』

るために使用されます。つまり、

『回帰モデルの評価のタスク』

で利用されます。

R²の値

  • 値は 0 から 1 の範囲
  • R²の値が1に近いと、モデルがデータ(のすべての変動)をよく説明していることになります。

回帰モデルとは、ある二つの変数の関係を表す式のうち、統計的手法によって推計された式のこと

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