Sampling Strategies

The Mayor of NYC is trying to determine if a new subway line is needed. He divides the city into 50 neighborhood blocks and randomly selects 10 blocks to survey. Within each block, he surveys the entire neighborhood. This is an example of a _________ sample.

• Random

• Stratified

• Convenience

• Cluster

LOA seniors are trying to determine this year's prom theme. The prom planning committee goes into the Titan Center and asks the first 25 people that they see. This is an example of a ___________ sample.

• Cluster

• Random

• Convenience

• Systematic

A car company wants to determine what the most popular color of car is. A company representative goes to an intersection of a busy road and records the color of every 7th car that passes through the intersection. This is an example of a ____________ sample.

• Systematic

• Cluster

• Stratified

• Random

Mrs. Smith's 5th grade class has decided to play tug of war. To make the teams fair, she first splits the class into boys and girls. She then randomly selects 3 boys and 3 girls to be on a team. She continues this process until she has 4 teams. This is an example of a __________ sample.

• Systematic

• Cluster

• Stratified

• Convenience

A sample of 2,000 was sought to estimate the average achievement in science of fifth graders in a city’s public schools. The average fifth grade enrollment in the city’s elementary schools is 100 students. Thus, 20 schools were randomly selected and within each of those schools all fifth graders were tested. This is an example of a ____________ sample.

• Stratified

• Random

• Cluster

• Systematic

A researcher is interested in maximum-security inmates. She groups inmates by the type of crime committed, and randomly selects 10 inmates from each group. This is an example of a _________ sample.

• Cluster

• Stratified

• Random

• Systematic

All employees of the company are listed in alphabetical order. From the first 10 numbers, you randomly select a starting point: number 6. From number 6 onwards, every 10th person on the list is selected (6, 16, 26, 36, and so on), and you end up with a sample of 100 people. This is an example of a __________ sample.

• Random

• Stratified

• Convenience

• Systematic

All employees of the company are listed in alphabetical order. From the first 10 numbers, you randomly select a starting point: number 6. From number 6 onwards, every 10th person on the list is selected (6, 16, 26, 36, and so on), and you end up with a sample of 100 people. This is an example of a __________ sample.

• Random

• Stratified

• Convenience

• Systematic

Dr. Bowling wants to determine if students are satisfied with school lunch. He randomly selects 100 students and asks them about school lunch. This is an example of a ____________ sample,

• Systematic

• Convenience

• Random

• Cluster

A drinks company produces 1200 bottles of pop every 30 minutes. For quality control purposes, 12 bottles are selected and checked every 30 minutes. Each bottle passes through the machine in a single file. The workers randomly select 12 bottles from the 1200 in no particular order. This is an example of a _______ sample.

• Systematic

• Cluster

• Random

• Stratified