nPilot: Calculates the remaing sample size when using pilot sample

In cgu-dados/auditsampling: A auxiliary package to calculate some basic things in sampling. Most used para CGU auditors.

Description

Based on a pilot sample, this function calculates the remain elements to the final sample given the variance considered.

Usage

nPilot(s2 = NULL, pq = NULL, n1, alpha, moe, N)

Arguments

s2	The variance, as σ^2. Not necessary if pq is not NULL.
pq	The variance, as P(1-P). Not necessary if s2 is not NULL.
n1	The size of the pilot sample.
alpha	1 - confidence level.
moe	Margin of error.
N	Population size.

Value

The final sample is

n = n_1 + n_2

Where n_2 is the value returned by this function.

References

COCHRAN, William Gemmell. Sampling techniques-3. 1977.

Examples

nPilot(s2=13.5,n1=30,alpha=0.05,moe=5, N = 306)
nPilot(s2=13.5,n1=30,alpha=0.05,moe=5, N = 5000)
nPilot(pq=0.15,n1=30,alpha=0.1,moe=0.05, N = 306)
nPilot(pq=0.15,n1=30,alpha=0.1,moe=0.05, N = 5000)

cgu-dados/auditsampling documentation built on March 24, 2021, 9:38 a.m.