Sampling Method

A teacher puts students' names in a hat and chooses without looking to get a sample of 10 students.

• Simple random sampling

• stratified random sampling

• Cluster random sampling

• Non of the above

Assign each car in a dealership a number and then use a random-number table to select the cars to be inspected. 

• systematic
• simple random sample
• convenience
• volunteer response

Marianne wanted to know students' opinion on the new schedule at school. She places students' names in a container and randomly picks out 20 names. 

• Convenience Sampling
• Systematic Random Sampling
• Simple Random Sampling
• Volunteer response

Why do we randomly select our samples?

• for control
• reduce bias
• so we don't get the same answers from everyone
• to eliminate confounding results

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.
She selects the first five who raise their hands.

• Systematic
• Convenience
• Voluntary Response
• Simple Random

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.
She selects the five closest to her desk.

• simple random
• Voluntary Response
• Convenience
• Systematic Random

Which of the following is TRUE?

• In a multi-stage random sample, all individuals and all subsets of the sample size have an equal chance of being selected.
• In a stratified random sample, all individuals and all subsets of the sample size have an equal chance of being selected.
• In a cluster random sample, all individuals and all subsets of the sample size have an equal chance of being selected.
• In a simple random sample, all individuals and all subsets of the sample size have an equal chance of being selected.

An independent research company wants to go door to door to survey people in the city of Fontana. The company decides to number all blocks within the city limit, randomly choose 50 blocks and survey all households on each selected block. 
This is an example of:

• Simple Random Sample
• Stratified Random Sample
• Cluster Random Sample
• Systematic Random Sampling

A ___ is a large group that includes everything being studied.

• Sample
• Stratified Sampling Method
• Population
• Voluntary-Response

A ___ is a small portion of the population used to gather data from.

• Systematic Sampling Method
• Sample
• Population
• Bias