Sexual assault in college: In a Washington Post/Kaiser Family Foundation Poll conducted from January through March 2015, 20% of women (ages 17‑26) who attended college during the past 4 years say they...

Sexual assault in college: In a Washington Post/Kaiser Family Foundation Poll conducted from January through March 2015, 20% of women (ages 17‑26) who attended college during the past 4 years say they were sexually assaulted. The poll surveyed 514 randomly selected females.

What is the 90% confidence interval for the proportion of women (ages 17‑26) who attended college during the past 4 years and say they were sexually assaulted?