: Periodic fluctuations that occur at fixed intervals (e.g., higher sales every December).

: Ups and downs that are not of a fixed period, often related to business cycles.

: A stationary time series has statistical properties (like mean and variance) that do not change over time, which is a common requirement for many forecasting models.

Introduction To Time Series And Forecasting -

: Periodic fluctuations that occur at fixed intervals (e.g., higher sales every December).

: Ups and downs that are not of a fixed period, often related to business cycles. Introduction to Time Series and Forecasting

: A stationary time series has statistical properties (like mean and variance) that do not change over time, which is a common requirement for many forecasting models. : Periodic fluctuations that occur at fixed intervals (e