To estimate the proportion of troops who support the U.S. militarys Dont Ask, Dont Tell policy of

Question:

To estimate the proportion of troops who support the U.S. military’s “Don’t Ask, Don’t Tell” policy of discharging people who are openly homosexual, a political researcher interviewed a random sample of 50 troops from the population at a particular army base. She found that 69% of the sample favored this policy. With this information,
(a) Find the standard error of the proportion and
(b) Find the 95% confidence interval for the population proportion.