How Many Parameters Are Necessary to Define an EWMA Model

question 20

Multiple Choice

How many parameters are necessary to define an EWMA model

• A) 1
• B) 2
• C) 3
• D) 4

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Definitions:

Cumulative

Describes something that increases or accumulates over time.

Guttman Scale

A scale that contains either favourable or unfavourable statements arranged hierarchically. Agreement with a strong statement implies agreement with weaker ones; disagreement with a weak one implies disagreement with stronger ones.

Cumulative Items

The accumulation or sum of items over a period.

Unidimensionality

A Guttman scale consists of a single (low to high) dimension. It is also cumulative; that is, agreement with the highest-scoring item implies agreement with all lower-scoring items.