Question

If the candidate only wants a 0.2% margin of error at a 95% confidence level, what size of sample is needed?

Answer 1

n = 22

Explanation:

Using

n = p(1-p)(Zc/E)²

From table E = 0.2 while p= 0.37

So substituting

We have n= 22.4

Thats a sample size of approximately 22