Answer:
The total number of people in the US is the population while the 3000 people selected for the study is the sample.
Explanation:
In the study according to the illustration, the population of study is the total number of people in the US while the sample is the number of people selected out of the population for the study which is 3000.
In a research, a population refers to the total number of individuals present in an area at a specific time where researchers wish to conduct their study.
A sample, on the other hand, refers to a portion of a population of interest during a research, that is selected via a suitable sampling procedure to represent the entire population.
It is most often virtually impossible, time, and resource consuming to study the entire population during a research, especially for a large population. Hence, sampling represents a faster and more economic way of studying populations although this leaves room for different margins of errors.
