What term refers to all the cases in a group being studied, from which samples may be drawn?

The term that refers to all the cases in a group being studied, from which samples may be drawn, is "Population." In the context of research, the population encompasses the entire set of individuals or items that share specific characteristics pertinent to the study. This could include everything from people within a certain region to all potential customers for a product, depending on the research question being posed.

Understanding the concept of a population is crucial because it sets the framework for effective sampling strategies. Researchers typically draw samples from the population to make generalizations about it without needing to study every individual within that group. This can save time and resources while still allowing for valid inferences about the larger group.

The other choices like sample, subset, and demographic refer to different aspects of research. A sample is a smaller group taken from the population, a subset is a specific portion of cases within a larger set, and demographic refers to statistical characteristics of a population, such as age, gender, and income levels. While these terms are related, the population is the foundational concept that encompasses all individuals relevant to the study.