The Voting Rights Act of 1965 greatly increased both the number of African American voters and the number of African American elected officials

"The process in which participants are chosen randomly from the target population" is a definition of

a. margin of error or sample error. b. confidence level. c. 95% confidence level. d. sample. e. probability sampling.

Howell and his colleagues supplemented their analysis of presidential appropriations power by examining __________ during periods of both war and peace

A)congressional voting records on a variety of policies B) Supreme Court decisions on objections to presidential policies C)public opinion polls on the president's policies D)the content of editorial columns about the president