Dear,
I am using EpiInfo to analysis survey data.
However there some issues that I still do not know how to figure out. What is the formula used to compute the Population survey. I found one n = [DEFF*Np(1-p)]/ [(d2/Z21-α/2*(N-1)+p*(1-p)]. But I do not know how to estimate the "Np". What makes NP different from N ?
Supposing that I have
DEFF= 1
p=5%
d=4%
Z=1.96 and
N=2500
Trying this I have a sample size of 484 from EpiInfo.
Please could you help me.
Kind regards,
Evans,