. SerialCorrelationTest is a generic function used to test for the presence of lag-one serial correlation using either the rank von Neumann ratio test the normal approximation based on the Yule-Walker estimate of lag-one correlation or the normal approximation based on the MLE of lag-one correlation. Well explore this further in this section and the next.
Informally it is the similarity between observations as a function of the time lag between them.
A time series is a sequence of measurements of the same variable s made over time.
