sample.size.mean {samplingbook}

Sample Size Calculation for Mean Estimation

Description

The function sample.size.mean returns the sample size needed for mean estimations either with or without consideration of finite population correction.

Usage

sample.size.mean(e, S, N = Inf, level = 0.95)

Arguments

e

positive number specifying the precision which is half width of confidence interval

S

standard deviation in population

N

positive integer for population size. Default is N=Inf, which means that calculations are carried out without finite population correction.

level

coverage probability for confidence intervals. Default is level=0.95.

Value

The function sample.size.mean returns a value, which is a list consisting of the components

call

is a list of call components: e precision, S standard deviation in population, and N integer for population size

n

estimate of sample size

Author(s)

Juliane Manitz

References

Kauermann, Goeran/Kuechenhoff, Helmut (2010): Stichproben. Methoden und praktische Umsetzung mit R. Springer.

See Also

Smean, sample.size.prop

Examples

# sample size for precision e=4
sample.size.mean(e=4,S=10,N=300)
# sample size for precision e=1
sample.size.mean(e=1,S=10,N=300)