It is one of the statistics to test whether there is autocorrelation in the disturbance term in a linear regression model, and was proposed by J. Durbin and GS Watson in 1950, and a table of critical values for the test was given. The Durbin-Watson ratio is usually represented by the symbol d , and d generally takes a value in the range of (0, 4), with a value closer to 0 if the disturbance term has positive autocorrelation and a value closer to 4 if the disturbance term has negative autocorrelation. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
線形回帰模型において攪乱項に自己相関があるか否かをテストするための統計量の一つで,1950年 J.ダービンと G.S.ワトソンにより提案され,また検定のための臨界値の表が与えられた。ダービン=ワトソン比は通常記号 dで表わされ,dは一般に (0,4) の範囲の値をとり,攪乱項に正の自己相関があると0のほうに近く,負の自己相関があると4のほうに近い値をとる。
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