Question 1138901
The point estimate is 150/200 or 0.75 as the proportion.
a 98% CI is z* sqrt(0.75*0.25/200) and z 0.99 is 2.33
half-interval is 2.33*sqrt(0.0009375) or 0.071, 0.07 here
98%CI is (0.68, 0.82) with margin of error of 7%
(0.679, 0,821) is to 3 decimal places