Choose the BEST answer. Same-sex marriage: In a recent ABC News/Washington Post
ID: 3293973 • Letter: C
Question
Choose the BEST answer. Same-sex marriage: In a recent ABC News/Washington Post poll, 1, 016 adults nationwide answered the question, "Overall, do you support or oppose allowing gays and lesbians to marry legally?" Of the respondents, 619 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 (0.594, 0.624) (0.579, 0.639) (0.584 0.634) (0.570, 0.648)Explanation / Answer
The statistical software output for this problem is:
One sample proportion summary confidence interval:
p : Proportion of successes
Method: Standard-Wald
95% confidence interval results:
Hence,
95% confidence interval will be:
(0.579, 0.639)
Option B is correct.
Proportion Count Total Sample Prop. Std. Err. L. Limit U. Limit p 619 1016 0.60925197 0.01530735 0.57925011 0.63925382