required.sample.size: Estimate sample size to find population proportion with given...

In sfrechter/physplit.analysis: Packaged and versioned Analysis functions for Shahar's cells

Description

Estimate sample size to find population proportion with given tolerance

Usage

required.sample.size(epsilon, pest = 0.5, alpha = 0.05, N = Inf)

Arguments

epsilon	Tolerange of proportion estimate (see details)
pest	The estimated proportion (leave at 0.5 if unknown)
alpha	The confidence interval is (1-alpha)*100%
N	Population size (default implies infinite population)

Details

Estimated proportion should have (1-alpha)*100% confidence of being within p +/- epsilon of the true proportions

Value

numeric

References

See https://onlinecourses.science.psu.edu/stat414/node/264

See Also

Other population-sampling: prop.ci, sample_finite_population, truepos_given_sample

Examples

required.sample.size(0.04, alpha=0.1)
required.sample.size(0.04, alpha=0.1, N=40)
# epsilon here is equivalent to +/- 4
required.sample.size(10/40, alpha=0.1, N=40)

sfrechter/physplit.analysis documentation built on May 29, 2019, 8:02 p.m.