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SAMPLING
Uneconomic

May not have the
Ideal for statistical
1 RANDOM SAMPLING accurate details of
purposes the population

Members of the target population have Hard to achieve in
an equal chance of being selected practice
= follows no predictable manner




2 OPPORTUNITY SAMPLING
ADVANTAGES DISADVANTAGES
When people just happen to…

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4 STRATIFIED SAMPLING

Involved in classifying the population into
categories, non overlapping groups/ strata, e.g
geographical areas, age groups, genders.
= A SAMPLE IS TAKEN FROM EACH STRATUM




Picking only
one participant




Not representing
Quick and cheap
5 QUOTA SAMPLING the population as
to organise a whole
(Similar to stratified…

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