April11 Random and Biased Samples

1.  Carlos wants to know the favorite sport of people at his school so he asks his baseball team.

• Biased
• Unbiased

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

7. A public library asked every 10th person who entered to name the type of book they were getting

• Biased
• Unbiased

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

3.  A hospital wants to open a gym. They ask the night-shift ER staff when they would use the gym.

• Biased
• Unbiased

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

4. A company makes DVDs and randomly selects 25 from 1500 to test them to see if they work.

• Biased
• Unbiased

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Ana wants to know the average student’s opinion of the tardy policy at her school. Which group of students should she survey in order to achieve the most accurate results?

• thirty students who are often tardy
• thirty students who are rarely tardy
• thirty of her friends
• thirty randomly selected students from her school

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Marcos wants to find out how many students at his school like to go to the movies. Which survey method is likely to produce a representative survey?

• Ask the boys in the boys locker room.
• Ask the 25 students in his homeroom class.
• Ask students coming out of a movie theater.
• Ask half of the 34 students on the soccer team.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

A computer manufacturer surveys its customers who purchased laptop computers to ask what software the company should include with its computer.  Identify the population.

• Customers who purchased laptop computers.
• Customers of the store.
• Customers who are interested in software.
• Computer manufacturers

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

To evaluate the defect rate of its memory chips, an integrated circuit manufacturer tests every 100th chip off the production line.

• Biased Sample

• Unbiased Sample

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Students who wish to represent the school at a school board meeting are asked to stop by the office after lunch

• Biased Sample

• Unbiased Sample

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

A real estate agent surveys people about their housing preferences at an open house for a luxury townhouse.

• Biased Sample

• Unbiased Sample

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1