Evaluation of Close Circuit Television surveillance systems at Rosebank and Killarney Malls, Johannesburg, South Africa

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12. Population and Sampling
As for the research population and sample size, (Creswell (2014:146) suggested that when selecting participants for a study, ‘’it is important to determine the size of the sample the study will needs. Population refers to all the elements (individuals, objects, or substances) that meet certain criteria for inclusion in a given universe and a sample is a subset of the population that is selected for a particular study and sampling as the process by which the author selects a number of individual cases from a larger population. (Babbie & Mouton,2016:67).
12.1 Purposive Sampling
The purposive sampling technique, also called judgment sampling, is the deliberate choice of a participant due to the qualities the participant possesses (Creswell,2014:45). The objective of purposive sampling is to seek information-rich cases that are able to provide individual perspectives and experiences that are relevant to the research questions. The sample is recruited from the sampling frame using non-probability sampling. The researcher decides what needs to be known and sets out to find people who can and are willing to provide the information by virtue of knowledge or experience and accordingly used in qualitative research to identify and select the information-rich cases for the most proper utilization of available resources (Patton,2002:67).Having guided by (Paton,2012:61) the proposer will go ahead with the identification and selection of individuals or groups of individuals that are proficient and well-informed with a phenomenon of interest. Participants will be recruited using criterion sampling, which is a purposive sampling method. The main purpose of criterion sampling is to recruit a sample that satisfies a set of predetermined criteria (Patton,2002:67). According to (Creswell,2014:54) in a qualitative research tradition, the size of the participants can be between 2 and 40. Table 1 below in this proposed study, will suggest 36 research participants It is essential that all participants have [similar lived] experience of the phenomenon being studied.
Table 1: Research participants

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