Sampling Techniques

The CDC chooses 15 hospitals around the country to survey. Every doctor in the chosen hospitals is required to participate in the study.

• Random sampling

• Systematic sampling

• Convenience sampling

• Stratified sampling

• Cluster sampling

The Dean of Mathematics uses a random number generator to generate 100 GHC ID numbers. Each student whose ID is generated will participate in the study.

• Random sampling

• Systematic sampling

• Convenience sampling

• Stratified sampling

• Cluster sampling

The Vice President for Academic Affairs divides the GHC student population into groups based on the campus attended. Fifty students from each campus are randomly selected to participate in a survey.

• Random sampling

• Systematic sampling

• Convenience sampling

• Stratified sampling

• Cluster sampling

A statistics professor surveys all of her students to obtain sample data consisting of the number of credit cards each student possesses.

• Random sampling

• Systematic sampling

• Convenience sampling

• Stratified sampling

• Cluster sampling

At a police sobriety checkpoint, every fifth driver was stopped and interviewed by the local police department.

• Random sampling

• Systematic sampling

• Convenience sampling

• Stratified sampling

• Cluster sampling

The student population at the local middle school is divided into groups using birth month (12 groups). Ten students from each birth month group are randomly selected to participate in an afterschool program.

• Random sampling

• Systematic sampling

• Convenience sampling

• Stratified sampling

• Cluster sampling

Fundraisers for the GHC Foundation test a new telemarketing campaign by obtaining an alphabetical list of all GHC alumni and selecting every 100th name on the list, beginning with the first name.

• Random sampling

• Systematic sampling

• Convenience sampling

• Stratified sampling

• Cluster sampling

The IRS researcher investigates cheating on income tax reports by surveying all waiters and all waitresses at 35 randomly selected restaurants.

• Random sampling

• Systematic sampling

• Convenience sampling

• Stratified sampling

• Cluster sampling

In a recent political poll, a computer is used to randomly generate telephone numbers for subjects that were called and interviewed.

• Random sampling

• Systematic sampling

• Convenience sampling

• Stratified sampling

• Cluster sampling

For a statistics assignment, you pass out surveys to the first 25 GHC students you meet in the parking lot.

• Random sampling

• Systematic sampling

• Convenience sampling

• Stratified sampling

• Cluster sampling