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| - Research Instruments |
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| - Suveys |
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| - 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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