방법 비교

	적합도 검정 (Goodness-of-Fit Testing)	결정 계수(R²)
분야	모델 평가	모델 평가
계열	MCDM	MCDM
기원 연도	1900	1896
창시자	Karl Pearson	Karl Pearson
유형	Hypothesis testing framework for model adequacy	Goodness-of-fit metric
원전	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.
별칭	goodness of fit test, GOF test, model fit assessment	R², coefficient of determination, r2 score
관련	4	5
요약	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.