✳️ Regression analysis is a special case of Durbin-Watson model where the autocorrelation coefficient is zero. ✳️ Autoregressive model or Autoregressive error model indicates the existence of the lag(s). ✳️ The lag(s) is a main factor of sampling distribution of DW test statistic. ✅ This slide shows how the lag(s) affect the sampling distribution of Durbin-Watson test statistic. Since the sampling distribution changes, the critical values of Durbin-Watson test statistic cannot be displayed by a critical value table‼️ 📌Software has been released on google site, https://tinyurl.com/dwtestsoftware. ✅ source code included. ✅ Software running video: https://youtu.be/hDt1fxhrfaw 🔆 Seek cooperation!!!