By Seymour Sudman
Though many researchers operating with survey learn equipment are acutely aware that robust sampling innovations can be found, it seems that they stay away from them simply because they think those strategies are too tough or too high priced to take advantage of. as an alternative, careless advert hoc methods are usually applied, from time to time with disastrous effects. utilized SAMPLING represents an important departure from the various strong books on sampling which suppose subtle statistical wisdom or broad assets. the amount, which abounds in useful examples of the type that researchers most often come upon of their paintings, is meant for the very huge majority of survey clients who've in simple terms constrained statistical backgrounds and assets yet who desire to maximize the usefulness of the knowledge they receive. the writer conscientiously outlines a large array of fairly basic techniques which are less dear than, and fairly similar to, the main specific equipment now in present use.
APPLIED SAMPLING may be a useful useful asset to all clients of survey learn equipment - sociologists, industry researchers, academic researchers, software evaluators, and scholars of those topics.
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Extra resources for Applied Sampling
2). Other parts of this study, containing no comparisons, have lower credibility. Discussion o f Limitations 2. There is a very brief discussion of the limita tions of the study, suggesting that 15% of passing pedestrians who were asked to cooperate refused; but there is no discussion of the possible biases of using pedestrians, or of what hours or days were used for interviewing. Use o f Special Populations 5. Aside from the biases, the respondents were part of the general population. Sample Size 4.
The refutation of study findings must come from other studies with greater credibility. 2 A CR ED IB ILITY SCALE To formalize the notion of credibility and organize the discussion in this chapter, a credibility scale has been developed for judging small-scale samples. The credibility scale includes the factors that samplers would generally consider in looking at a sample: the generalizability of the findings, sample size, the execution of the sample design, and the use of the available resources.
The decision will depend on the available funds and the quality of the sample required. A very useful procedure that may not occur to the novice is the use of combined methods. These combined methods use the optimum sampling procedures dis cussed in Chapter 6 and are more complex than using only a single method. The combined sample, however, may be far more efficient—that is, for the same funds, it yields a much larger and higher-quality sample. Typically, one starts with the cheapest procedure, the self-administered mail questionnaire if the population is appropriate, or a telephone interview.