A study population is: A. the theoretical and hypothetical aggregation of all elements as defined for a given survey B. that aggregation of elements from which the sample is actually selected C. the theoretically specified aggregation of survey elements D. that aggregation or set of elements considered for selection in some stage of sampling

The study population is the group of the people in the study who are called the study of the population. In clinical settings, the participants make up the study population. The study population might be an example consisting of children under the age of two who comes in society. The group has been studied for different reasons such as their response to the drugs or risk for getting a disease such as HIV, cancer, etc. In various health care, these studies have been taken. The research population is also known as a well-defined population of individuals. All individuals and the subject under certain populations usually have the common, binding characteristics and traits.