anm.samp.design {asbio}

Animated demonstration of randomized sampling designs

Description

Animated Comparisons of outcomes from simple random sampling, stratified random sampling and cluster sampling.

Usage

anm.samp.design(n=20, interval = 0.5 ,iter = 30, main = "", lwd = 2, lcol = 2)

samp.design(n = 20, main = "", lwd = 2, lcol = 2)

anm.samp.design.tck()

Arguments

n

The number of samples to be randomly selected from a population of 400.

interval

Time length spent on each frame in animation (in seconds).

iter

Number of random iterations in animation.

main

Main heading.

lwd

Line width to distinguish strata in stratified and cluster designs.

lcol

Line width to distinguish strata in stratified and cluster designs.

Details

Returns a plot comparing outcomes of random sampling, stratified random sampling and cluster sampling from a population of size 400. For stratified random sampling the population is subdivided into four equally strata of size 100. and n/4 samples are taken within each strata. For cluster sampling the population is subdivided into four equally sized clusters and a census is taken from two clusters (regardless of specification of n). The function anm.samp.design depicts random sampling using animation

Value

A plot is returned with four subplots. (a) shows the population before sampling, (b) shows simple random sampling, (c) shows stratified random sampling, (d) shows cluster sampling. The function anm.samp.design.tck provides interaction with a tcltk GUI.

Author(s)

Ken Aho

Examples

samp.design(20)

#Animated demonstration
## Not run: anm.samp.design(20)