การกำหนดประชากรและกลุ่มตัวอย่างในงานวิจัย

Abstract

A population refers to the entire group of human beings or non-human entities chosen for participation in a study or each unit of interest to researchers. A population for a research study may comprise groups of living and non-living things, such as a person, a group of people, organizations, administrative agencies, animals, objects, etc. The important factors determining a sample size in the research comprised at least three factors: a reliability level, and a degree of accuracy of the estimated statistical values, and a distribution of population groups. In general, the sample sizes can be determined using computer programs and sample size tables. A sample group is a group that is drawn from a population to represent a research study. The two main methods of sampling for research studies were: Non-Probability Sampling and Probability Sampling.