In 1970, the Typical U

question 163

Multiple Choice

In 1970, the typical U.S. household earned about $8,700. In 2013, the typical U.S. household earned about $51,939. If adjusted for inflation, the gross income of the typical U.S. household in 2013 relative to 1970 has

• A)increased dramatically.
• B)increased somewhat.
• C)remained relatively stable.
• D)decreased somewhat.
• E)decreased dramatically.

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Definitions:

Correlation Coefficient

A numerical measure that quantifies the degree and direction of relationship between two variables, ranging from -1 to 1.

Independent Variable

The variable that is manipulated or changed in an experiment to test its effects on the dependent variable.

Dependent Variable

The outcome variable in an experiment or study that is expected to change in response to manipulations of the independent variable.

Scatterplot

A graphical representation in which two variables are plotted along two axes, helping to show the relationship between them.