Time Series Decomposition & Stationarity – Practice Quiz

Learn to describe temporal structure before fitting forecasts. Original demand, energy and environmental examples explore additive and multiplicative components, seasonal adjustment, stationarity definitions, autocovariance and sample ACF interpretation. Prerequisites: variance, covariance and introductory time-indexed data. The questions move from identification to calculations and counterexamples, with both single-select and multiselect items and worked explanations.

Reading: Statistical reference 1; Statistical reference 2.