Sampling

General Strategies for Sample Selection

Sample selection

What are some general strategies for sample selection? Why the right selection of sampling method is so important for any research? There are two broad classifications of sampling procedures: random and non random sampling. Both of these methods have several techniques and researcher select a technique that is most pertinent to their research. Sometimes there are more than one sampling …

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Purposeful Sampling in Qualitative Research

purposeful sampling

Purposeful sampling is a non-random sampling technique that utilizes a specific criteria or purpose to select particular sample. The researcher may use one or more than one strategies or criteria to select the sample. The aim is to collect in depth information from the right respondents. Principles of purposeful sampling The basic principle of purposeful sampling is that information is …

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Stratified Random Sampling

Stratified Random Sampling

Stratified random sampling is a type of random sampling or probability sampling. Random sampling ensures that every member of the population has an equal and independent chances of selection. In a population where there is low heterogeneity simple random sampling is very effective. In case the population has elements that does not share common characteristics the researcher should use another …

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Quota Sampling in Qualitative Research

Criterion Sampling

Quota sampling is a type of non-probability sampling in statistics and research. It is somewhat similar to stratified sampling except that it is a non-random sampling method. Its use is more common when there is no obvious sampling frame available or the researcher has a low budget and less time to undertake the research. Sampling process The method for sample …

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Inclusion and Exclusion Criteria in Research

criteria

It is a common practice in clinical studies to clearly identify the inclusion and exclusion criteria for the research participants. The researcher uses a criteria that defines what participants should participate in the clinical trial. The researcher also specify a criteria to explain why other participants cannot participate in the research. Factors influencing inclusion and exclusion criteria The inclusion of …

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Purpose of sampling in research

Sampling

Written by Saira Naeem Before diving head on into the purpose of sampling in research, a quick revision of the previous information and known facts, definitions etc may be needed. As you know a sample is a subset or a smaller part chosen from a larger population.A sample is chosen using any one of the techniques of probability of non …

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Random Sampling in Research

Simple random sampling

Written by Saira Naeem As a student of research you most certainly would have heard and be familiar with the terms populations, samples, probability and non probability sampling methods etc. These are all sampling terminologies an understanding of these terminologies help the researcher in undertaking the research. While there are various text books on research methods that most certainly and …

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Sampling in Research Studies

Sampling in research Sampling in research is the process of drawing sample of a desired size from the population. A sample is a specimen that is representative of the population from which it has been selected. A sample can be taken from a population for various end-uses: in statistics sample of data is taken to draw conclusion about the whole …

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