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 Outline on  Survey Sampling
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  See Also:  Research Instruments
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  See Also:  Suveys
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  See Also:  Overview of Social Science Methodology
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  Survey Sampling is the process by which you chose who will take the survey
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  If you compare two or groups of people, survey equal numbers of each 
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In many cases, a sample of 50 gives one a scientifically valid sample for each variable examined
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In Sampling strategy, Probability Sampling is preferable
Quota sampling is acceptable, & less expensive
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The choice of Sampling Strategy is determined by FOUR factors
      a. funds
      b. numerical & geogrpahic scope
      c. availability of adequate sampling frame
      d. chosen method for collecting data
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There are TWO Types of Sampling
      a. Cluster Sampling is the most widely used
          A sample of groups ( clusters ) is drawn before individuals w/in them are identified & selected
      b.  Interval selection:  from a list, choose respondents at fixed intervals
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Nonresponse can ruin any sample
Whatever the sampling strategy, you must gain the cooperation 
     of as many members of the sample as possible
When is a sampling rate consider adequate?
No clear answer
Your Statistical Package will give you a number of options for dealing w/ non-responses
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The End