How to Design and Evaluate Research in Education, 5/e

Jack R. Fraenkel, San Francisco State University
Norman E. Wallen, San Francisco State University

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

2003 McGraw-Hill Higher Education
Any use is subject to the Terms of Use and Privacy Policy.
McGraw-Hill Higher Education is one of the many fine businesses of The McGraw-Hill Companies.