What type of sample?

Every fifth person boarding a plane is searched thoroughly.

What type of sample was taken?

• Simple Random Sample

• Stratified Sample

• Cluster Sample

• Systematic Sample

• Voluntary Response Sample or Convenience Sample

At a local community College, five math classes are randomly selected out of 20 and all of the students from each class are interviewed.

What type of sample was taken?

• Simple Random Sample

• Stratified Sample

• Cluster Sample

• Systematic Sample

• Voluntary Response Sample or Convenience Sample

A researcher selects and interviews separate random samples of fifty male and fifty female teachers.

What type of sample was taken?

• Simple Random Sample

• Stratified Sample

• Cluster Sample

• Systematic Sample

• Voluntary Response Sample or Convenience Sample

A researcher for an airline interviews all of the passengers on five randomly selected flights.

What type of sample was taken?

• Simple Random Sample

• Stratified Sample

• Cluster Sample

• Systematic Sample

• Voluntary Response Sample or Convenience Sample

1000 alumni of a university are randomly selected from the alumni database to participate in a survey about their careers after graduation.

What type of sample was taken?

• Simple Random Sample

• Stratified Sample

• Cluster Sample

• Systematic Sample

• Voluntary Response Sample or Convenience Sample

A community college student interviews everyone in their biology class to determine the percentage of all students who own a car.

What type of sample was taken?

• Simple Random Sample

• Stratified Sample

• Cluster Sample

• Systematic Sample

• Voluntary Response Sample or Convenience Sample

A market researcher separately randomly selects 200 drivers under 35 years of age and 100 drivers over 35 years of age.

What type of sample was taken?

• Simple Random Sample

• Stratified Sample

• Cluster Sample

• Systematic Sample

• Voluntary Response Sample or Convenience Sample

All of the teachers from 85 randomly selected nation’s middle schools were interviewed.

What type of sample was taken?

• Simple Random Sample

• Stratified Sample

• Cluster Sample

• Systematic Sample

• Voluntary Response Sample or Convenience Sample

To avoid working late, the quality control manager inspects the last 10 items produced that day.

What type of sample was taken?

• Simple Random Sample

• Stratified Sample

• Cluster Sample

• Systematic Sample

• Voluntary Response Sample or Convenience Sample

The names of 70 contestants are written on 70 cards, the cards are placed in a bag and stirred, and three names are picked from the bag.

What type of sample was taken?

• Simple Random Sample

• Stratified Sample

• Cluster Sample

• Systematic Sample

• Voluntary Response Sample or Convenience Sample