DrJacobs Is Planning to Survey U

Multiple Choice

Dr.Jacobs is planning to survey U.S.voters regarding their views on the healthcare plan promoted by the president.To provide the most accurate results, the people he surveys must include the same proportion of men, women, young, old, professionals, blue-collar workers, Republicans, Democrats, whites, African Americans, Native Americans, Latinos, and Asians.Thus, Dr.Jacobs will use random selection to obtain a(n)

A) natural clinical trial.
B) representative sample.
C) equated population.
D) biased sample.