Biased and Unbiased Samples

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

• Biased
• Unbiased

2.  A homeowner divides their backyard into 5 sections, and randomly removes soil from sections.

• Biased
• Unbiased

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

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

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

• Biased
• Unbiased

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

• Biased
• Unbiased

To see who has a computer at home the front office chooses 10 students randomly per grade to ask

• Biased
• Unbiased

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

5. The first 100 people at the park Thursday were asked if dogs should be off leashes in the park.

• Biased
• Unbiased

10. A senator wants to how she is doing.  She sends a survey to 1000 registered voters in her party

• Biased
• Unbiased

Tags

CCSS.RL.11-12.6

9. A radio hosts wants to know where his listeners go for vacation.  He takes 10 phone calls

• Biased
• Unbiased

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.HSS.IC.A.1

CCSS.HSS.IC.B.3

CCSS.HSS.IC.B.4