A population consists of all the members of a group of interest. A sample is a subset of the population.
Systematic sample.
Practice makes perfect
A population consists of all the members of a group of interest. Since it may be impractical to examine every member of a population, a sample — a subset of the population — is sometimes selected to represent the population. The sample can then be analyzed to draw conclusions about the entire population.
Let's consider our situation.
A taxicab company wants to know whether its customers are satisfied with the service. Drivers survey every tenth customer during the day.
Here, the population consists of the customers who use a certain taxicab company. The sample consists of every tenth customer each driver has during the day. Samples can be classified into different categories.
