The Most Common of the Psychoactive Substances, Used by 90

question 116

Multiple Choice

The most common of the psychoactive substances, used by 90% of Americans, is

• A)nicotine.
• B)caffeine.
• C)marijuana.
• D)opium.

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Definitions:

5-number Summary

A descriptive statistics tool that consists of the minimum, first quartile, median, third quartile, and maximum of a data set.

Z-score

A statistical measure that describes a value's relationship to the mean of a group of values, measured in terms of standard deviations from the mean.

Standard Deviations

A gauge for evaluating how much the data values vary or diverge from each other in a dataset.

Data Values

The individual pieces of information or numerical figures that are collected and analyzed in a study.