When People Such as Cohen Say That a Medium Size

question 70

Multiple Choice

When people such as Cohen say that a medium size difference has an effect size of .50, they are saying that we want the power for

• A) one mean being half as large as another.
• B) one mean being half a point larger than another.
• C) one mean being half a standard deviation larger than another.
• D) one mean being based on half as many subjects as the other.

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Definitions:

Alpha

A measure of the active return on an investment compared to a market index, used to assess the performance of an investment such as a stock or portfolio.

MAD

An acronym for Mean Absolute Deviation, which measures the average magnitude of errors in a set of predictions, without regard to direction.

Weighted Moving Average

A method used in statistics and analysis that calculates the average of a data set by giving different weights to different data points.

Demand Data

Information related to the desire for and consumption of goods or services, used for analysis in business strategy and planning.