The sampling strategy that you select in your dissertation should naturally flow from your chosen research design and research methods , as well as taking into account issues of research ethics . To set the sampling strategy that you will use in your dissertation, you need to follow three steps: (a) understand the key terms and basic principles ; (b) determine which sampling technique you will use to select the units that will make up your sample; and (c) consider the practicalities of choosing such a sampling strategy for your dissertation (., what time you have available, what access you have, etc.).
What is great about random samples is that you can generalize to the population that you are interested in. So if you sample 500 households in your community, you can generalize to the 50,000 households that live there. Think of a sample as a slice of the whole pie. If you match some of the demographic characteristics of the 500 with the 50,000, you will see that they are surprisingly similar. That is the beauty of a sample!
Return from the difference between a population and a sample to samples and size. NEW BOOK! How to Successfully Deal with Your Dissertation Data by Susan Rovezzi Carroll [You can purchase it online at Amazon, Barnes and Noble.] EMAIL @ OFFICE 860-489-5639 CELL 860-459-5075