noun
coefficient of determination; R-squared
A statistical measure used in regression analysis to indicate how well data fit a model. Often denoted R².
この回帰モデルの決定係数は0.85で、かなり当てはまりが良い。
The coefficient of determination for this regression model is 0.85, indicating a fairly good fit.
相関係数 (correlation coefficient) measures the strength and direction of a linear relationship between two variables, while 決定係数 (coefficient of determination) represents the proportion of variance explained by a model.
Compound of 決定 (decision, determination) and 係数 (coefficient). A direct translation of the English statistical term 'coefficient of determination'.