Research in Education

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Fantastic 9 Links to the free online theses : 1.  PQDT Open https://pqdtopen.proquest.com/search.html 2.  Open Thesis and Dissertations https://oatd.org/ 3.  Networked Digital Library of Theses and Dissertations http://search.ndltd.org/index.php 4.  University of Malaya Students Repository http://studentsrepo.um.edu.my/ 5.  Australasian Digital Theses http://adt.caul.edu.au/ 6.  Theses Canada Portal http://www.collectionscanada.ca/thesescanada/ 7.  Council of Australian University http://www.caul.edu.au/ 8.  Virginia Polytech Institute & State University Digital Library & Archives https://vtechworks.lib.vt.edu/handle/10919/5534 9.  Malaysian Theses Online (MyTo) http://myto.upm.edu.my/myTO/myto.html

Non-probability sampling is a sampling method in which not all members of the population have an equal chance of participating in the study, unlike probability sampling. Each member of the population has a known chance of being selected. Non-probability sampling is most useful for exploratory studies like a pilot survey (deploying a survey to a smaller sample compared to pre-determined sample size). Researchers use this method in studies where it is impossible to draw random probability sampling due to time or cost considerations.

Probability sampling is defined as a sampling technique in which the researcher chooses samples from a larger population using a method based on the theory of probability. For a participant to be considered as a probability sample, he/she must be selected using a random selection.