A __________ sample is a probability sample in which elements sharing one or more characteristics are grouped, and elements are selected from each group in proportion to the group’s representation in the total population.

Refer to the "What Do You Think?" box on page 414. Which is an example of a highly subjective key?

a. The incumbent hasn't experienced a major scandal. b. The incumbent party's candidate has charisma. c. The incumbent administration did not have any major failure in foreign affairs. d. There is not a significant third-party challenge.

Which of these offices acts as the launch pad for the implementation of presidential policy?

A. Executive Office of the President (EOP) B. National Security Council C. White House counsel D. Office of Management and Budget E. Council of Economic Advisors