I.12 Find the margin of error. A May 2015 Quinnipiac University Poll asked 2105 American adults (18 years and over), “As you may know, David Letterman has retired. Thinking about other late-night television talk show hosts who are currently on TV, who is your favorite?” Jimmy Fallon came out on top, with 20% of Americans favoring him over others.
(a) What is the population for this sample survey?
(b) Assuming the sample was a random sample, use the quick and approximate method to find a margin of error. Make a confidence statement about the opinion of the population.