Several variables are associated with longer life expectancy

One way to remove the possible effects of per-capita income as a variable is to examine only countries with similar levels of income per capita. This is an example of using:
a. the comparative cases method.
b. the multiple cases method.
c. a control variable.
d. quantitative comparative analysis.

Answer: c

Political Science

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A major grievance of Al Qaeda is the U.S

a. presence in Saudi Arabia. b. support for the Palestinians. c. support for Israel. d. presence in Islamic holy lands.

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How did the United States react to the Kyoto Protocol, a global climate conference sponsored by the United Nations?

A) The U.S. felt that agricultural production was responsible for global issues and put all aspects of the protocol into place. B) The U.S. required all developing nations to join the agreement after it signed. C) The U.S. was the first to sign the protocol agreement. D) The U.S. did not allow the protocol to go to the Senate for ratification. E) The U.S. initiated the Kyoto Protocol in response to pressure from environmental PACs.

Political Science