Data Definitions Quiz Review

Interview the first 30 students who enter the school in the morning. 

• simple random
• voluntary response
• systematic
• convenience

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

Political webpages often allow readers to rate whether they strongly agree, agree, disagree, or strongly disagree with the President's decision on any given situation. This is a form of:

• Voluntary Response
• Convenience Sampling
• Simple Random Sampling
• Systematic Random Sampling

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

Disneyland often surveys its guests as they exit a restaurant during their visit. The surveyor stands at the restaurant exit, counts the number of people leaving, and surveys every 25th guest.
This is a form of:

• Simple Random Sample
• Stratified Random Sample
• Voluntary Response
• Systematic Random Sampling

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 teacher hands out an index card and asks all of her students to write down the following information: age, height (in inches), and what grade they are in.
Which of the following best describes her method of data collection?

• Census
• Simple Random Sample
• Cluster Random Sample
• Stratified Random Sample