Samples that are not in this research provided by specific random (Purposive sampling) As the general public is too belly round benchmark. The number of 2 people.
The samples used in this study were selected by random placement (Purposive sampling) is an individual with a round belly up to the standard of 2 people.
The right of this research selected by purposive sample (Purposive sampling) is the people who are around the belly than the standard criteria. The 2 people .