Bias

An employer wants to know how their 500 employees like working for them. Which is the most representative sample?

• Ask the first 75 people to show up for work

• Randomly select the names of 10 employees

• Poll the Employees of the Month for the past year

• Randomly select the names of 75 employees

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Which would be the least biased sample group of PB students?

• every third student entering the building

• eveyone in the lunchroom at lunch

• every 8th grader

• the first 10 students to arrive

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

A survey is being conducted to determine if a cable company should add another sports channel to their schedule. Which random survey would be the least biased?

• surveying 30 men at a gym

• surveying 45 people at a mall

• surveying 50 fans at a football game

• surveying 20 members of a high school soccer team

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

A survey is being conducted to determine which types of television programs people watch. Which survey and location combination would likely contain the most bias?

• surveying 10 people who work in a sporting goods store

• surveying the first 25 people who enter a grocery store

• randomly surveying 50 people during the day in a mall

• randomly surveying 75 people during the day in a clothing store

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Erica is conducting a survey about the proposed increase in the sports budget in the Hometown School District. Which survey method would likely contain the most bias?

• Erica asks every third person entering the Hometown Grocery Store

• Erica asks every third person leaving the Hometown Shopping Mall this weekend.

• Erica asks every fifth student entering Hometown High School on Monday morning.

• Erica asks every fifth person leaving Saturday’s Hometown High School football game.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

A survey is being conducted to determine which school board candidate would best serve the Yonkers community. Which group, when randomly surveyed, would likely produce the most bias?

• 15 employees of the Yonkers school district

• 25 people driving past Yonkers High School

• 75 people who enter a Yonkers grocery store

• 100 people who visit the local Yonkers shopping mall

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.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

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

• Biased
• Unbiased

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

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