Ethnic groups are typically defined by common physical traits, languages, cultures, or history

In differential research, some potentially confounding variables may be controlled with

A) Manipulation of the dependent variable. B) Manipulation of the independent variable. C) Use of a carefully selected control group. D) Use of more rigorous statistical analyses.

Which of the following is a strategy that campaigns frequently use when attempting to control media coverage?

a. giving the media unlimited and unfettered access to candidates b. staging media events c. refusing to talk to the press d. telephone canvassing