In A Random Sample of 678 ADULT MALES 20 TO 34 Years of age, it was deermined that 58 of them have hypertension.
You wish to conduct your own study to determine the proportion of adults of 20-35 years old who have hypertension. What sample size would be needed for the estimate to be within 3 percentage points with 95% confidence if you use the point estimate in part a.
part a was obtain a point estimate for the portion. 58/768=.085
Okay this is what I did, .085(1-.085)(1.96/.03)^2 and I got 54.42...
The answer is suppose to be 336, I am wondering what i did wrong here.