Selecting samples - introduction
3 important questions on Selecting samples - introduction
Many researchers, for example Barnett (2002), argue that using sampling makes possible a higher overall accuracy than a census, why?
- You can collect more detailed information
- you can afford higher-quality staff
- you can devote more time trying to obtain data from more difficult to reach cases.
- more time can be devoted to checking and testing the data for accuracy prior to analysis.
Sampling techniques available to you can be divided into two types:
- non probability sampling
What are non-probability samples?
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