Selecting samples - probability sampling
3 important questions on Selecting samples - probability sampling
The process of probability sampling can be divided into four stages; what are those stages?
1. Identify a suitable sampling frame based on your research question(s) and objectives
2. Decide on a suitable sample size
3. Select the most appropriate sampling technique and select the sample
4. Check that the sample in representative of the target population.
2. Decide on a suitable sample size
3. Select the most appropriate sampling technique and select the sample
4. Check that the sample in representative of the target population.
What is the sampling frame for any probability sample?
The sampling frame for any probability sample is a complete list of all the cases in the target population from which your sample will be drawn.
What was highlighted in reseach by Edwards et al. (2007) about using existing databases for you sampling frame?
- individual databases are often incomplete;
- the information held about organisations in databases is sometimes inaccurate;
-the information held in databases soon becomes out of date
- the information held about organisations in databases is sometimes inaccurate;
-the information held in databases soon becomes out of date
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