calc_n_dirichlet: Calculate implied sample size of a Dirichlet distribution

In devincaughey/estsubpop:

Description

Given a proportion and its sampling variance, calc_n_dirichlet calculates the implied sample size of the corresponding Dirichlet distribution. That is, if a simplex is distributed Dirichlet(p * N) and one element p equals prop and has sampling variance prop_variance, calc_n_dirichlet calculates the implied value of N using the formula (prop * (1 - prop) / prop_variance) - 1.

Usage

calc_n_dirichlet(prop, prop_variance)

Arguments

prop	stipulated proportion
prop_variance	stipulated sampling variance

Value

The implied “sample size” of the Dirichlet distribution.

Author(s)

Devin Caughey

Examples

## proportion of 0.5 with standard error of 0.01
calc_n_dirichlet(0.5, 0.01 ^ 2)

devincaughey/estsubpop documentation built on June 11, 2019, 1:31 p.m.