Because social and policy research is difficult to pin down, researchers often employ multiple methods to confirm their findings, an approach called _______________.

5 The U.S. Supreme Court:

a. is the only court established by the Constitution. b. chooses lower federal judges. c. supervises state judicial systems. d. has extensive original jurisdiction.

In a(n) ______________ researchers use data collected for one unit of analysis to make inferences about another unit of analysis.

a. Cross-level analysis b. Ecological inference c. Ecological fallacy d. Arrow diagram