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Its effectiveness depends on the knowledge and skill of the researcher in selecting cases.
Includes convenience, purposive, and quota sampling.
Assumes that members of the target population know one another.
Use of a city telephone directory as a sampling frame introduces this problem.
An operational definition of a population that provides a basis for drawing a sample.
For samples of 1,000, the population percent lies within +3 or –3 percentage points of the sample estimate.
The theoretical values of a statistic (e.g., the mean) for all possible random samples of a fixed size.
With this process, each case has a known probability of being included in the sample.
This value decreases as sample size increases.
This type of sampling design may be either proportionate or disproportionate.
“English-speaking Boston residents 65 years of age or older who are not living in nursing homes or long-term care facilities” is a practical definition of a ________.
A main purpose of this probability sampling design is to reduce the costs of data collection.