The Special Census of Maricopa County, Arizona, gave 1995 populations for the following cities:

Suppose that you are interested in estimating the percentage of persons who have been immunized against polio in each city and can take an SRS of persons. What should your sample size be in each of the 5 cities if you want the estimate from each city to have margin of error of 4 percentage points? For which cities does the finite population correction make a difference?