We want to determine the type of study being conducted in the described situation.
Members of a student council at your school ask every eighth student who enters the cafeteria whether they like the snacks in the school's vending machines.
To do so, let's first recall the different types of studies and their definitions.
The sample is divided into one or more groups that undergo a change in order to collect data on their response. The effects of the experiment are then measured and compared with other groups, for instance with a control group that does not undergo a change.
Uses a model to reproduce a situation or a process so that the simulated outcomes closely match the real-world outcomes.
In our situation, the data are obtained from answers given by every eighth person that enters the cafeteria. Therefore, the situation describes a survey.
