Political Research Associates has been hired to conduct a survey to determine the percentage of voters. If the election were held today, who would vote for Candidate X for president? Candidate X has not even announced her candidacy for president and there are no previous surveys that would indicate voter preferences. Still, Political Research Associates must estimate the variability in the population in order to determine the size of the sample they need for their survey for Candidate X. Which of the following would be the wisest choice for estimating variability?
A) ±5 percent
B) p = 1.96
C) q = 100 percent, p = 50 percent
D) p = 50 percent, q = 50 percent
E) n = 51 percent, q = 49 percent
Answer: D) p = 50 percent, q = 50 percent