Site MapHelpFeedbackSampling
Sampling

Chapter Outline

What is a Sample?

Samples and Populations
Defining the Population
Target Versus Accessible Populations
Random Versus Nonrandom Sampling

Random Sampling Methods

Simple Random Sampling
Stratified Random Sampling
Cluster Random Sampling
Two-Stage Random Sampling

Nonrandom Sampling Methods

Systematic Sampling
Convenience Sampling
Purposive Sampling

A Review of Sampling Methods

Sample Size

External Validity: Generalizing from a Sample

Population Generalizability
When Random Sampling is not Feasible
Ecological Generalizability








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