Samples - Biased & Unbiased

Carlos wants to know the favorite sport of people at his school so he asks his baseball team. What type of sample would this be?

• Biased

• Unbiased

To determine how many students plan to attend the school musical, Maria surveys 100 random people in the hallway.

• Biased

• Unbiased

Biased or Random?

Chloe and Danna want to determine the favorite subject of all students in the middle school. So they place every middle school student's name in a bucket and choose 30 to poll.

• Biased sample

• Random sample

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

• biased

• unbiased

Shelley wants to survey grocery shoppers about their favorite brands. She goes to the store at 8am and surveys the first 50 people. Is this a biased sample or unbiased sample?

• Biased Sample

• Unbiased Sample

The sample should REPRESENT the population so you can INFER what the larger group is like.

If you take a BAD sample, it does not allow you to make inferences about the larger population.

Choose the option below that says "Biased Sample"

• A sample that accurately represents the population

• A sample that is selected randomly from the population

• Biased Sample

When a sample does not accurately represent the population it is a:​ ​ (a)  

• Biased Sample

• Unbiased sample

Casey surveyed the members of his soccer team to ask them what their favorite sport is. Is this a biased sample or unbiased sample?

• Biased Sample

• Unbiased Sample

An airline wants to know if people prefer to check their luggage or carry it on. They ask every 10th person that walks into the airport. Is this a biased sample or unbiased sample?

• Biased Sample

• Unbiased sample?

A newspaper randomly chooses 100 names from its subscriber list and then surveys those subscribers to find out if they read the sports section. This sample is ........

• unbiased

• biased