Dr. Alesse interviews a group of 50 teen mothers to determine what sort of knowledge they hold regarding use of contraceptives prior to the time they became pregnant. She then writes an article where she speaks in broad terms about what teen mothers' know about the use of contraceptives prior to becoming pregnant. In this study, the group of 50 teen mothers is called the , while all teen mothers are collectively called the .

This is simply defined as a group to which researchers are very interested in an experimental studies. It consists of all elements—individuals, items, or objects—whose characteristics are being studied.

Sample

This is commonly known as a portion or part of of a population.it is that portion of the population selected for study or simply put it as portion with which the study is conducted.

Sampling

This is simply the process taken for selecting a group of participants with which to conduct a study.

The population for a study is composed of two groups mainly;

1. The target population

2. The accessible population.

A sample also acts as a subset of the population that is selected to represent the population. When a sample is selected, the researcher is able to make claims about the population based on data from the sample alone.