The time series component that reflects the irregular changes in a time series that are not caused by any other component,and tends to hide the existence of the other more predictable components,is called:
A) trend.
B) cyclical.
C) seasonal.
D) random variation.

Question

Quizplus · Accepted Answer

The random variation component reflects the unpredictable fluctuations in a time series that are not explained by any other component, such as measurement errors or unanticipated events. It can obscure the presence of the other more discernible components, making it difficult to isolate their effects.

The Time Series Component That Reflects the Irregular Changes in a Time