Stationary sequence
= Stationary sequence
{wiki=Stationary_sequence}
A stationary sequence refers to a time series where the statistical properties, such as mean, variance, and autocorrelation, do not change over time. This means that the behavior of the sequence remains consistent regardless of when it is observed. In more technical terms, a sequence (or process) is considered stationary if it satisfies the following conditions: 1. **Constant Mean**: The expected value (mean) of the sequence is the same across all time periods.