Exercise 7 Page 316

A population consists of all of the members of a group of interest. Since it might be unrealistic to consider every member of a population, a sample is sometimes selected to represent the population. A sample is a subset of the population. The sample can then be analyzed to draw conclusions about the entire population.

Let's think about our situation.

Of a group of 200 workers, 15 are chosen to participate in a survey...

Here, the population consists of all workers. The sample consists of only 15 workers chosen to participate in a survey.