Random selection and random assignment (ch 5)
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Sample size calculator
A statistical program used to provide a recommended sample size
Random assignment
Placement of participants into experimental conditions on the basis of a chance process
Random selection
Selection of participants using a random sampling method
Purpose of random selection
To obtain a representative sample
Purpose of random assignment
To produce two or more equivalent groups for use in an experiment
Mixed sampling
Use of a combination of quantitative and qualitative sampling methods