Question 1085207
The interval width is z(0.975)*sqrt (0.08*0.92)/400; sqrt term=0.01356.
The 0.975 is the z-value with 0.025 on each end or 95%. The sqrt is of p*(1-p)/n, and p is 32/400=0.08, the point estimate.
0.0266 is the interval width.
That is above and below the point estimate
(0.0534, 0.1066) is 95% CI