Sampling Methods and Bias

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

• simple random
• voluntary response
• 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
• volunteer response

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

CCSS.HSS.MD.B.6

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

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

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

CCSS.HSS.IC.B.4

Why do we randomly select our samples?

• to increase bias
• to reduce bias
• so we don't get the same answers from everyone
• because it's easier

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

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:

• Random Sample
• Convenience Sampling
• Voluntary Response
• Systematic Sampling

Tags

CCSS.7.SP.A.1

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

Tags

CCSS.7.SP.A.1

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

Tags

CCSS.7.SP.A.1

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.HSS.IC.A.1

CCSS.HSS.IC.B.3

State the type of sample.

A radio station asks its listeners to call in their opinion regarding the use of American forces in peacekeeping missions.

• Voluntary Response Sample

• Cluster Sample

• Convenience Sample

• Stratified Random Sample

Tags

CCSS.HSS.IC.B.3

A political polling group is interested in learning about the proportion of registered voters who favor a particular candidate for mayor. Which of the following sampling plans may have introduced bias?

• Individuals were selected randomly to participate from a list of registered voters.

• Every 50^th person on a list of registered voters was contacted and asked to identify who they would vote for in the upcoming election.

• A list of registered voters was first separated into two lists—one of males and one of females. Then individuals were selected at random from each of the two lists.

• A survey was mailed to all registered voters and those who returned the survey make up the sample

• None of the above sampling plans creates the potential for bias.

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3