If a Time Series Exhibits Increasing Seasonal Variation, One Approach

question 47

Multiple Choice

If a time series exhibits increasing seasonal variation, one approach is to first use a(n) ________ transformation that produces a transformed time series that exhibits constant seasonal variation. Then, ________ variables can be used to model the time series with constant seasonal variation.

• A) autocorrelation, dummy
• B) fractional power, dummy
• C) fractional power, constant
• D) autocorrelation, constant

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Definitions:

Radial

Relating to, or situated near the radius or forearm; in a broader sense, spreading out in all directions from a common center.

Ulnar

Pertaining to the ulna, one of the two long bones in the forearm, or related to areas supplied by the ulnar nerve.

Brachiocephalic Artery

The brachiocephalic artery is a major blood vessel arising from the aortic arch that supplies blood to the right arm and the head and neck.

Left Common Carotid

A major artery in the neck that supplies blood to the head, neck, and brain.