Random or Biased Sample

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

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 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

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

Ms. Madson wants to know how many students will attend the next 7^th grade after school dance.  She places all the 7^th grade students’ names in a jar and selects 50. Is this random or biased sampling?

• Random

• Biased

You want to know how many students catch the bus to go home.  You go to the bus stop and ask students how they go home from school.  Is this a random sample or biased sample?

• BIASED

• RANDOM

Billy wants to determine the favorite candy among all 7th graders. So he asks all the girls in his Math class. This is an example of a...

• biased sample

• random sample

A sample in which every person, object, or event has an equal chance of being selected.

• Random sample.

• Biased sample.

David wants to find out what the most popular pet in all of Dallas, so he puts every student's name into a bucket and polls 30 students.

• Biased sample

• Random sample

Cassandra and Isabella 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

• Random