What term describes all the cases in a studied group from which samples may be drawn?

The term that describes all the cases in a studied group from which samples may be drawn is "population." In research terminology, a population encompasses the complete set of individuals, items, or data points that share a common characteristic or that is of interest to the researcher. When conducting a study, researchers often aim to draw conclusions about a population based on observations or data collected from a smaller group known as a sample.

Understanding the concept of population is crucial for effective sampling and for making valid inferences about the larger group based on the results obtained from the sample. The distinction between population and sample is fundamental in statistical practice, as it helps researchers design their studies and analyze data effectively.