Researchers stop every third pedestrian on a busy street and ask about his or her attitude toward gun control. This is an example of
A)purposive sampling.
B)quota sampling.
C)simple random sampling.
D)systematic sampling.

Question

Quizplus · Accepted Answer

This is an example of systematic sampling because the researchers are using a specific system (stopping every third pedestrian) to select participants. Unlike random sampling, where every member of the population has an equal chance of being selected, systematic sampling involves selecting members based on a fixed, periodic interval.

Researchers Stop Every Third Pedestrian on a Busy Street and Ask