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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In Cox's view, what does the Cold War teach us about a rising China?
a. The early adoption of a containment policy can keep the relationship stable. b. A policy of containment will only prolong and intensify security and economic competition. c. Nuclear deterrence will avert any serious security competition. d. Fearing China's strengths and ignoring its weaknesses can exacerbate the security dilemma.
What are the two main areas of technological innovation throughout history? Give one example of each.
What will be an ideal response?