If a Research Group Plans to Conduct a Survey Poll

Multiple Choice

If a research group plans to conduct a survey poll about an upcoming presidential election in the United States, what is a best guess regarding the minimum percentage of all likely voters that will be needed to obtain a reasonably accurate estimation of voter opinion, assuming that a random sample is obtained?

A) 2 percent
B) 20 percent
C) 50 percent
D) 80 percent