DrJohns Is Studying the Effects of Caffeine on Memory

question 42

Multiple Choice

Dr.Johns is studying the effects of caffeine on memory.After comparing the subjects taking a placebo with those taking caffeine pills he concludes that caffeine enhances memory.He most likely used _____ to determine the difference between groups.

• A)descriptive statistics
• B)inferential statistics
• C)probabilities of test scores
• D)none of these

Understand the concept of mutually exclusive categories in measurement scales.

Recognize the principles behind scale precision and the hierarchy of measurement scales.

Comprehend central tendency measures and how to calculate them.

Determine the appropriate measure of central tendency based on data characteristics.

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Definitions:

Negative Externality

A negative externality is a cost imposed on a third party not involved in the production or consumption of a good or service, such as pollution.

Positive Externality

A beneficial effect experienced by a third party who did not choose to incur that benefit, often resulting from an individual's or firm's actions.

Corrective Tax

A tax designed to internalize externalities, effectively correcting market outcomes that might otherwise result in social inefficiency.

Command-And-Control Policies

Regulatory strategies where the government sets specific limits and controls on emissions or discharges, often requiring technology or methods to be used.