The Last Four Weekly Values of Sales Were 80, 100

question 57

Multiple Choice

The last four weekly values of sales were 80, 100, 105, and 90 units. The last four forecasts were 60, 80, 95, and 75 units. These forecasts illustrate:

• A) qualitative methods.
• B) adaptive smoothing.
• C) slope.
• D) bias.
• E) trend projection.

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Definitions:

Significance Level

A threshold set by the researcher to determine the point at which the results of a statistical test can be considered to demonstrate a meaningful effect, typically denoted by alpha (α).

Effect Size

A measure of the magnitude of difference between two groups, usually calculated as Cohen’s d.

Significant Difference

A difference between groups or conditions that is unlikely to have occurred by chance alone, according to a predefined threshold of statistical significance.

Independent Samples

Groups in a study or experiment that are randomly assigned and do not influence each other.