What kind of sampling should be done when there is a small group of patients, easily available?
Correct Answer: Random sampling
Description: Random sampling (simple random sampling)
- It is a technique whereby each sampling unit has the same probability of being selected.
- Random sampling is done, when there is a small group of patients.
Multiphase sampling:
- This is used to take basic data from a large sample and details from a sub-sample.
Multistage sampling
- The first stage is to select the groups or clusters. Then, subsamples are taken in as many subsequent stages as necessary to obtain the desired sample size.
Eg:
1st stage: Choice of states within countries.
2nd stage: Choice of towns within each state.
3rd stage: Choice of neighborhoods within each town.
Soben Peter
Essentials of preventive and community dentistry
4th edition
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Dental
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