The sampling method is divided into two major categories, namely,1. by not using sampling probability (Nonprobability sampling).As an example, regardless of whether the sample of each unit has much less chance of being selected?Make do not know the probability of each of the units in the population will be selected. To select a sample of this form is not able to bring the results to the reference population. But it is convenient and save time and money over which can do it as follows:1.1 group a coincidence (Accidental sampling) is selected.According to need, without criteria. Samples will be who can provide information.1.2 choosing a quota sample (Quota sampling) is a select group.Regardless of the proportion of population elements, such as when you want to sample 100 people, it is divided into male and 50 female and 50 people, select option anyone is coincidence until vs. number of want. 1.3 group a specific example (Purposive sampling) is to select samples based on the researcher's own decision. The characteristics of the selected group are in accordance with the objectives of the research. To select the sample of specific learning needs expertise and experience on the subject of those who do the research. To select the sample, this has a name, called the Judgement sampling.
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