Since 1970, How Has the Structure of American Families Changed

question 571

Multiple Choice

Since 1970, how has the structure of American families changed?

• A) The number of single-parent households has doubled, while the number of married couples living together with children has sharply decreased.
• B) The number of childless married couples has almost doubled.
• C) The number of two-parent households with children has increased dramatically, while the number of single-parent households has dropped.
• D) The number of people living in the average American household has almost doubled.

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Definitions:

Level of Significance

The threshold probability used in hypothesis testing to determine whether to reject the null hypothesis.

Probability

A measure of the likelihood of occurrence of an event, expressed as a number between 0 and 1, where 0 indicates impossibility and 1 indicates certainty.

Z Statistic

A statistic that tells us how many standard deviations an element is from the mean. It is used in hypothesis testing.

Probability

A measure quantifying the likelihood that events will occur, ranging from 0 (impossibility) to 1 (certainty).