Samples and Surveys

_______ is a part of a group being surveyed.

• Sample
• Population

_______ is the entire group of objects or individuals considered for a survey.

• Sample
• Population

What would be the population in this example?
Surveyors in a mall choose shoppers to ask about products they prefer.

• the surveyors
• all shoppers in the mall
• the shoppers who were asked their preferences

What would be the sample in this example?
Surveyors in a mall choose shoppers to ask about products they prefer.

• the surveyors
• all shoppers in the mall
• the shoppers who were asked their preferences

Marianne wanted to know her classmates' opinion on the new schedule at school. She places their names in a container and randomly picks out 20 names.  What type of sample did she use?

• Convenience Sampling
• Systematic Sampling
• Simple Random Sampling
• Biased Sampling

For a school survey, you interview the first 30 students who enter the school in the morning. What type of sample did you take?

• representative sample
• simple random sample
• biased convenience sample

For inspections, the manager assigns each car in his dealership a number.  Afterwards, he writes the numbers on slips of paper and places them in a bowl to pick which cars will be inspected. What type of sample is he using?

• systematic sample
• simple random sample
• biased convenience sample
• biased voluntary response sample

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 Sampling
• Convenience Sampling
• Biased Voluntary Response Sampling
• Systematic Sampling

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys so she selects the five closest to her desk. This is an example of a....

• Random Sample
• Representative Sample
• Biased Convenience Sample
• Systematic Sample

To determine the average age of students at the elementary school, Leslie surveyed 20 random kids in 1st grade.  Is this sample representative of the school? 

• yes, she surveyed 20 kids randomly
• no, she only surveyed 1st graders