Which is NOT an example of an observational study?
A. Researchers assign participants to teach either older or younger people how to use a computer to test whether participants appear more frustrated teaching older people.
B. A manager uses sales records to compare the performance of different employees.
C. A professor studies the relationship between democracy and per capita income using country-level data from the World Bank.
D. A political scientist uses data from a random sample survey of 2000 US adults to examine the effect of media exposure on people’s trust of government.
A. Researchers assign participants to teach either older or younger people how to use a
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Peace operations of the United Nations include __________.
A. war regulation B. use of force to protect shipping C. supervision of elections D. intervening in ethnic conflicts to create a cease-fire
As used in the text, the term "devolution of power" relates to the flow of power
A. from Scotland, Wales, and Northern Ireland to Westminster B. from Westminster to London C. from London to Westminster D. from Westminster to Scotland, Wales, and Northern Ireland
The ______ Act provides a pathway towards citizenship for children of undocumented immigrants.
a. USA Patriot b. Immigration c. DREAM d. Naturalization
The United States does not use referenda at the national level
Indicate whether this statement is true or false.