Obtain a census of the class and survey each person in the class to determine their favorite flavor of ice cream

Ask every fifth person that walks through the door what their favorite flavor of ice cream is before class starts

Randomly select several of the most popular students in the class to answer questions about their favorite ice cream flavor

There is no effective way to obtain a representative sample from the target population

Group students into several homogeneous groups and choose one group to survey in order to determine the class's favorite ice cream flavor

population; sample

sample; population

population; group

cluster; stratum

There are no similarities between these two.