I a Typical Monthly Seasonal Index of 107

question 19

Multiple Choice

i. A typical monthly seasonal index of 107.0 indicates that sales (or whatever the variable is) are 7 percent above the annual average) .
ii. For a quarterly time series, the initial step, using the ratio-to-moving average method, is to remove the seasonal components from the time series using a 3-month centered moving average)
iii. In the final step, using the ratio-to-moving-average method on quarterly data, the total of the modified means should theoretically be equal to 400 because the average of should be 100.

• A) (i), (ii) and (iii) are all correct statements
• B) (i) and (ii) are correct statements, but not (iii).
• C) (i) and (iii) are correct statements but not (ii).
• D) (ii) and (iii) are correct statements but not (i).
• E) All statements are false

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Definitions:

Firs

A genus of evergreen coniferous trees belonging to the family Pinaceae, known for their needle-like leaves and their role as popular Christmas trees.

Gymnosperm Phyla

A group of seed-producing plants that includes conifers and cycads, characterized by seeds that are not enclosed within an ovary.

Morphology

The examination of the shape and architecture of living entities and their unique anatomical characteristics.

Ovary Wall

The outer layer of an ovary in plants or animals, often involved in protecting and nurturing developing reproductive cells.