First And Second Order Autocorrelation. Second-order autocorrelation occurs when error terms two periods apart are correlated and so forth. Jul 29 2010 The simplest most common kind of autocorrelation first-order autocorrelation occurs when the consecutive errors are correlated.
No first-order autocorrelation F 1 27 124790 Prob. Significant correlations at the first or second lag followed by correlations that are not significant. However the PACF may indicate a large partial autocorrelation value at a lag of 17 but such a large order for an autoregressive model likely does not make much sense.
We say that the data is autocorrelated or there exists autocorrelation if cov ei ej 0 for some i j.
Negative ρ indicates negative autocorrelation. The long-term spectra and autocorrelation functions are similar for both first-order and second-order interval RIS click trains especially in regard to the autocorrelation features that have been used to account for the perception of RIS sounds Yost 1996 1997. No first-order autocorrelation F 1 27 124790 Prob. If the ordinary Durbin-Watson test indicates no first-order autocorrelation you can use the second-order test to check for second-order autocorrelation.
