Which of the Following Statements Is Not Correct

question 45

Multiple Choice

Which of the following statements is not correct?

• A)A moving average for a time period is the simple arithmetic average of the values in that time period and those close to it.
• B)A value of the smoothing constant w close to 1 results in a very large smoothing, where as a value of w close to zero results in very little smoothing.
• C)The accuracy of the forecast with exponential smoothing decreases rapidly for predictions of the time series more than one period into the future.
• D)A moving average 'forgets' most of the previous time-series values, and is considered a relatively crude method of removing the random variation.

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Definitions:

\(\sum _ { i = 0 } ^ { 5 }\)

A summation notation representing the addition of a sequence of numbers, from the index i equals 0 to i equals 5.

\(n ^ { 2 }\)

Represents the square of a number n, calculated as n multiplied by itself.

\(( n - 2 ) !\)

The factorial of the quantity \(n-2\), representing the product of all positive integers less than or equal to \(n-2\).

\(n ^ { 2 }\)

An algebraic expression indicating the square of the variable n.