A systematic increase or decrease in the mean of a demand time series is referred to as
A) random variation.
B) a seasonal pattern.
C) a cyclical adjustment.
D) a trend.

Question

Quizplus · Accepted Answer

A systematic increase or decrease in the mean of a demand time series is referred to as a trend. Random variation refers to fluctuations that cannot be attributed to a specific cause or pattern, while a seasonal pattern involves repeating patterns in a time series that occur at regular intervals. A cyclical adjustment refers to changes in a time series that occur due to economic cycles or other longer-term fluctuations.

A Systematic Increase or Decrease in the Mean of a Demand