Random vs Biased Samples

Which of these statements best describes a biased sample?

• It is very small.

• It is not randomly chosen.

• It results in incorrect predictions.

• It does not accurately represent the population.

Biased or Random?

Isaac wants to find out the favorite foods of students at Churchill. He asks the boys’ basketball team about their favorite foods.

• Biased sample

• Random sample

Biased or Random?

You want to survey the students in your school about their exercise habits. At lunchtime you stand by a vending machine. You survey every student who buys something from the vending machine.

• Biased sample

• Random sample

Biased or Random?

Jace wants to find out what the favorite soda flavor is at Churchill Middle School. He decides to ask all the students in Mrs. Shoemaker's class as a sample group.

• Biased sample

• Random sample

Biased or Random?

Teliciah wants to determine the most popular brand of cereal in all of California. So she polls all the houses on her street to get a sample.

• Biased sample

• Random sample

Biased or Random?

Audi wants to find out how students get to school at Churchill so she places the names of all students into a fish bowl and pulls out 50 so she can survey them.

• Biased sample

• Random sample

Biased or Random?

Marissa wants to learn what the most popular board game in the United States is, so she creates a poll and shares it on Twitter.

• Biased sample

• Random sample

Biased or Random?

Chris B. and Kris S. want to determine the most popular Basketball player in all of Sacramento so they poll everyone at lunch.

• Biased sample

• Random sample

Biased or Random?

Justin wants to determine who the most popular Twitch/tv streamer in the United States is. So he hacks the U.S. Census and includes the question in the 2020 census form that goes to every household in America.

• Biased sample

• Random sample

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