手法を比較

	適合度検定	決定係数 (R²)
分野	モデル評価	モデル評価
系統	MCDM	MCDM
提唱年	1900	1896
提唱者	Karl Pearson	Karl Pearson
種類	Hypothesis testing framework for model adequacy	Goodness-of-fit metric
原典	Pearson, K. (1900). On the criterion that a given system of deviations from the probable in the case of a correlated system of variables is such that it can be reasonably supposed to have arisen from random sampling. Philosophical Magazine, 50(302), 157-175.	Pearson, K. (1896). Mathematical contributions to the theory of evolution. Philosophical Transactions of the Royal Society A, 187, 253-318.
別名	goodness of fit test, GOF test, model fit assessment	R², coefficient of determination, r2 score
関連	4	5
概要	Goodness-of-fit (GOF) testing is a framework for assessing whether observed data are consistent with a hypothesized probability distribution or model. Originating from Karl Pearson's chi-square test (1900), GOF tests quantify the discrepancy between data and model predictions, yielding p-values to judge whether observed deviations are statistically significant or due to random chance.	The coefficient of determination, denoted R², measures the proportion of variance in the dependent variable explained by the independent variables in a regression model. Introduced by Karl Pearson in the late 19th century, R² is one of the most widely used metrics for assessing how well a model fits observed data.