Sampling
Sampling is a data collection or research that only elements of the sample (as of the elements of the population) were studied, the results are forecast data (estimate). Sampling is a sampling technique. To determine the sample to be used in research, there are different sampling techniques were used. The sampling technique used in this research is purposive sampling technique, the technique is imposed on the sample characteristics are already determined and known in advance based on the characteristics and nature of the population