Random and Biased Samples in Math

Allie wants to learn the most popular board game in the United States, so she creates a poll and shares it on Twitter. Random or Biased/

• Random

• Biased

Zeke wants to find out how 7th graders at OMS get to school so he places the names of all 7th graders into a fish bowl and pulls out 50 names so he can survey them. Random or Biased?

• Random

• Biased

Jacob wants to determine the favorite candy among all 7th graders. He asks all the people who sit in his row in Math class. Random or Biased?

• Random

• Biased

Ray wants to determine the most popular brand of soda in all of Missouri. He polls all the houses on his street to get a sample. Random or Biased?

• Random

• Biased

A science teacher at OMS wants to find out what is the most popular pet of students so she puts every student's name into a bucket and polls 30 students. Random or Biased?

• Random

• Biased

The student council sponsor asked every 10th student in the lunch line how they would prefer to be contacted with school news. Random or Biased?

• Random

• Biased

At her softball practice, Katie surveyed the athletes on her team to determine which sport teenagers like best. Random or Biased?

• Random

• Biased

A manager of a popular restaurant samples the receipts of every fifth customer to see if a dessert was ordered. Random or Biased?

• Random

• Biased

A town has 35,000 registered voters. A random sample of 500 voters finds that 125 are in favor of a new dog park. How many voters are likely to vote for the dog park?

• 8,750

• 2,625

• 125

• 2,500

A manager of a local store samples the receipts of every fifth person who goes through the line.  Out of 50 people, 4 had an item that was priced incorrectly.  If 600 people go through his store each day, how many people would you expect to have an incorrect price?

• 30

• 25

• 48

• 50