Stats Ch 12

_______ is a part of a group being surveyed.

• Sample
• Population
• Random Sample
• Quartile

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

• Sample
• Population
• Random Sample
• Quartile

Tags

CCSS.7.SP.A.1

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

• simple random
• population
• systematic
• convenience

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

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

• systematic
• random sample
• convenience
• biased sampling

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

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 Sampling
• Random Sampling
• Volunteer response

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

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

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

Disneyland often surveys its guests as they exit their 6 restaurant locations. The surveyors randomly select 30 people leaving each restaurant.
This is a form of:

• Random Sample
• Convenience Sampling
• Systematic Sampling
• Stratified 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
• representative
• Convenience
• Systematic 

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.
She picks the student in every 5th seat.

• Simple Random
• Systematic 
• Unbiased
• convenience

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

Elise, a supermarket employee, approached 50 random customers and asked whether they would be willing to discuss what they like most about the store.  She interviewed the 22 who said yes.  Is this sample of the supermarket's customers likely to be biased?

• yes
• no

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2