Define the terms population and sample, and explain the role of each in a research study. what is a population?
a. the entire group of individuals of interest
b. a relatively small group selected from the individuals of interest
c. a relatively large group selected to include as many individuals of interest as possible

c. A relatively large group selected to include as many individuals of interest as possible

Explanation:

The population can be defined by several characteristics used to conclude a specific subject in population. It can vague and specific. For example, several newborn babies in America with a blue eye is a specific population which studied the blue color of eyes. Most of the researcher wants to know the characteristics of every entity in a population so can get a very precise result of the population.  

Sample: A sample is a small and manageable group of a large population. It can be called a subset of a large population that describes the entity characteristics of a population. It can be called a pilot study.  

Both the term sample and population are the most important part of a research. A population is a vast group and sample is a small group to represent a population.