ssize {whSample}

Determine minimum sample size

Description

ssize takes a population size and returns a sample size

Usage

ssize(N, ci = 0.95, me = 0.07, p = 0.5)

Arguments

N

The population size

ci

The desired confidence interval (default is 0.95)

me

The margin of error (default: +/- 0.07)

p

The expected rate of occurrence (default: 0.50)

Value

Returns the estimated minimum sample size, rounded up to the nearest integer.

Details

ssize uses a normal approximation of the hypergeomtric distribution approach.

Examples

ssize(1000)
ssize(1000, ci=0.90, p=0.60)