7. Sampling

 From the Top

How big is big? If we are going to do a descriptive research job such as an evaluation of an instructor in a course, then the entire population of the class will participate; the entire population of anything will give us the best results. But if we need to find out how many people watch a particular television program in a city of 250,000 people, it becomes obvious that we cannot contact every person, and we must use inferential research procedures. Sampling is the best way to make this work manageable, but it must be done carefully to achieve meaningful results.


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