Calculate simple random sample size for estimating a proportion
Calculate the simple random sample size for estimating a proportion using the log-odds transformation.
nLogOdds(moe.sw, e, alpha=0.05, pU, N=Inf)
moe.sw |
switch for setting desired margin of error
(1 = CI half-width on the proportion;
2 = CI half-width on a proportion divided by |
e |
desired margin of error |
alpha |
1 - (confidence level) |
pU |
population proportion |
N |
number of units in finite population |
The function accepts five parameters, which are the same ones as accepted by nPropMoe.
The desired margin of error can be specified as the CI half-width on the proportion (moe.sw=1)
or as the CI half-width as a proportion of the population value pU (moe.sw=2).
numeric sample size
Richard Valliant, Jill A. Dever, Frauke Kreuter
Valliant, R., Dever, J., Kreuter, F. (2013, chap. 3). Practical Tools for Designing and Weighting Survey Samples. New York: Springer.
nLogOdds(moe.sw=1, e=0.05, alpha=0.05, pU=0.2, N=Inf) nLogOdds(moe.sw=2, e=0.05, alpha=0.05, pU=0.2, N=Inf)
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