According to the Text, Married Couples in 1970 Comprised 70

question 26

Multiple Choice

According to the text, married couples in 1970 comprised 70.6 percent of all U.S. households. In 2012, married couples comprised ______ percent of all households.

• A) roughly 70
• B) around 60
• C) just under 50
• D) only 30

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Definitions:

Degrees of Freedom

The number of independent pieces of information used in the calculation of a statistic, often representing the number of values free to vary.

T Distribution

A probability distribution used in statistical analysis when the sample size is small and the population standard deviation is unknown.

Standard Deviation

A measure that quantifies the variance or dispersion of a set of data points from their mean; indicating how spread out the data points are.

Confidence Interval

A sequence of statistical values, derived from a sample analysis, likely to capture the undisclosed value of a population characteristic.