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State the different types of sampling methods
Random
Systematicย
Opportunityย
Stratifiedย
Volunteerย
Random sampling
Every member of the population has an equal chance of being selected
Systematic sampling
A sampling frame is selected and every โnthโ person is usedย
Stratified sampling
Sample reflects natural proportions within the populationย
Opportunity sampling
Selecting participants who are available and willing to take partย
Volunteer samplingย
Asking people to volunteer who have the characteristics that you wantย
What are the problems with sampling?
Representativenessย
Availability of participantsย
Generalisabilityย