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PROBABILITYSAMPLING METHOD-

CLUSTER

SELVYN EZEKIEL, AZRI HAZIM , HASNOL LAHAP,, ALEXANDE

BALANGKIT

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CLUSTER (AREA) RANDOMSAMPLING

CLUSTER (AREA) RANDOMSAMPLING

Divide !"#$%i!& i&%!'#"%e*

R$&d!+# $+#e '#"%e* Me$"e $## "&i% i%.i&$+#ed '#"%e*

P!'ed"e/

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CLUSTER SAMPLING

Cluster samplingis an example of 'twostage sampling' !

"irst stage a sample of areas is #$osen%

Se#on& stage a sample of respon&ents wit$int$ose areas is s

Population &ii&e& into #lusters of $omogeneous units( usuall)geograp$i#al #ontiguit)!

Sampling units are groups rat$er t$an in&ii&uals!

A sample of su#$ #lusters is t$en sele#te&!

All units from t$e sele#te& #lusters are stu&ie&!

http://en.wikipedia.org/wiki/Cluster_samplinghttp://en.wikipedia.org/wiki/Cluster_sampling

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CLUSTER SAMPLING

Cluster samplingis an example of 'twostage sampling'

"irst stage a sample of areas is #$osen% Se#on& stage a sample of respon&ents wit$int$ose ar

is sele#te&!

Population &ii&e& into #lusters of $omogeneous unitsusuall) *ase& on geograp$i#al #ontiguit)!

Sampling units are groups rat$er t$an in&ii&uals! A sample of su#$ #lusters is t$en sele#te&!

All units from t$e sele#te& #lusters are stu&ie&!

http://en.wikipedia.org/wiki/Cluster_samplinghttp://en.wikipedia.org/wiki/Cluster_sampling

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CLUSTER SAMPLING++!

A&antages , Cuts &own on t$e #ost of preparing a sampling frame

T$is #an re&u#e trael an& ot$er a&ministratie #ost

-isa&antages, sampling error is $ig$er for a simple

ran&om sample of same si.e! /ften use& to ealuate a##ination #oerage in EPI

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CLUSTER SAMPLING++!

Identification of clusters

List all #ities( towns( illages 0 war&s of #ities wit$

t$eir population falling in target area un&er stu&)! Cal#ulate #umulatie population 0 &ii&e *) 12( t$is

gies sampling interal!

Sele#t a ran&om no! less t$an or e3ual to samplinginteral $aing same no! of &igits! T$is forms 4st

#luster! Ran&om no!5 sampling interal 6 population of 7n&

#luster!

Se#on& #luster 5 sampling interal 6 8t$#luster!

Last or 12t$#luster 6 79t$#luster 5 sampling inter

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CLUSTER SAMPLING++!

Two t)pes of #luster sampling met$o&s!

One-stage sampling! All of t$e elements wit$insele#te& #lusters are in#lu&e& in t$e sample!

Two-stage sampling! A su*set of elements wit$sele#te& #lusters are ran&oml) sele#te& forin#lusion in t$e sample!