"The sampling theory application is concerned with the proper collection of the population that will constitute the random sample and the selection of the people's behavior, experiences, or other elements with which to conduct a research study. Sampling means collecting data from the group of people in your research. We can use the followingexample, if you are researching the effects of exercise on diabetic patients in your community, you could survey a sample of 150 individuals to collect data from. The sample selected represents an identified population or a particular group of individuals that focus on the research."

Related to the sampling theory what would some other inclusion criteria be when studying the effects of exercise on diabetic patients?