The sample in this study are the people living in NA fai mueang Chaiyaphum aged 15 years or more from the random sample, the multiple steps (Multi – stage sampling), and willing to participate in this study. 379 number ones
The sample in this study is. People who live in the district Weir. Muang Chaiyaphum Chaiyaphum, aged 15 years and over by multi-stage random sample (Multi - stage sampling) and are willing to participate in this study of 379 people.
The subjects of this study. People living in the district Na Fai, Mueang Chaiyaphum aged 15 years. The multistage random sampling (Multi - stage sampling) and be willing to participate in this study were 379 people.