Which of the Following Is True

question 88

Multiple Choice

Which of the following is true?

• A)In trend analysis, the independent variable is time only if the equation is linear.
• B)The number of time periods in a centred moving average is always even.
• C)If the seasonal index for December sales is 120, this means that December sales tend to be 120% higher than the 'average' month.
• D)The cyclical component of a time series refers to repeating patterns that have a period of a year or less.

---

Definitions:

Climate

The long-term pattern of weather in an area, typically averaged over a period of 30 years.

Dam

A structure built across a river or stream to control the flow of water.

Erosion

The process by which natural forces like water, wind, ice, and gravity wear away land surfaces, redistributing the materials.

Sediment

Particles of rock and organic material that are transported and deposited by wind, water, or ice.