Same-sex marriage: In a recent ABC News/Washington Post
poll, 1377 adults nationwide answered the question, “Overall, do
you support or oppose allowing gays and lesbians to marry
legally?”
Of the respondents, 476 support same-sex marriage. What is the
95% confidence interval for the proportion of all American adults
who support same-sex marriage?
http://www.washingtonpost.com/page/2010-2019/WashingtonPost/2015/04/23/National-Politics/Polling/release_395.xml
(0.321, 0.371)
(0.333, 0.358)
(0.325, 0.367)
(0.313, 0.379)