What Percentage of the U.S. Population Uses Cocaine

question 23

Multiple Choice

What percentage of the U.S. population uses cocaine?

• A) 0.5%
• B) 1%
• C) 2%
• D) 5%

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Definitions:

Independent Variable

A variable that is manipulated or categorized to observe its effect on a dependent variable in experimental research.

Interaction Effect

In statistics, a circumstance where the effect of one independent variable on a dependent variable is different at different levels of another independent variable.

Main Effect

The immediate effect that an independent variable has on a dependent variable within an experimental framework.

Simple Effect

Analysis within ANOVA that looks at the effect of one factor at a specific level of another factor, useful in interactions.