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?