I used the following formula to calculate the sample size.
n = Z^2 * K * p * (1-p) / i^2;
(k = 2, Z = 1.96, p = expected proportion, i = 0.03)
I noticed that the sample size is not related to the population size, it means whatever the population size is small or large, the sample size is still the same! I do not assimilate? My idea is that if the population size is important, certainly the size of the sample increases and vice versa. Is there a requirement to use this formula?