Biased vs. Non-Biased Survey Questions

To determine how often people eat out, every tenth person entering a Chinese restaurant is surveyed.

• Biased Sample

• Unbiased Sample

Tags

CCSS.HSS.IC.B.3

To evaluate customer satisfaction, a grocery store gives double coupons to anyone who completes a survey as they enter the store. The store manager determines that customers are very satisfied with their shopping experience in his store.

• Unbiased

• Biased

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

CCSS.HSS.IC.B.4

CCSS.HSS.IC.A.2

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.7.SP.A.2

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

• Biased

• Unbiased

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

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.HSS.IC.A.1

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

• Biased

• Unbiased

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

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

• Biased Sample

• Unbiased Sample

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

CCSS.HSS.IC.B.4

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

• Biased

• Unbiased

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.3

CCSS.HSS.IC.B.4

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

To get valid results, a sample must be...

• biased

• unbiased