When conducting research sampling is a very important aspect due to it being the selection of a subset of cases from some population of interest. One of the reasons that sampling is important is that it is not likely that an investigator to be able to study all the people or cases in a given category. Another reason is that some sort of a selection process has to be carried out in an unbiased way so that it does not yield and sort of valid information. A sample is taken from the entire group of people or cases that involve direct interest to their investig

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