Samples Populations Biased Unbiased

To determine how often people eat out, every tenth person entering a fast food restaurant is surveyed.

• Biased Sample

• Unbiased Sample

A school survey asked 50 girls to identify their favorite items on the school cafeteria menu. This sample is ________________.

• Biased

• Unbiased

• Representative

• Numerical

A safety inspector conducts air quality tests on a randomly selected group of 7 classrooms at an elementary school.

• The population is all classrooms in the district; the sample is the 7 classrooms selected.

• The population is all classrooms in the elementary school; the sample is the 7 classrooms selected.

• The population is all elementary students in the school; the sample is the students in the 7 classrooms selected.

I surveyed 100 people at a grocery store by selecting every 3rd person that entered, does this sample represent the local population?

• Yes, it is random and unbiased.

• Yes, it is random and biased.

• No, while it is random, it is also biased.

• No, while it is random, it is also unbiased.

Biased or Unbiased?

Reign wants to determine the most popular brand of cereal in all of Kentucky. So he polls all the houses on his street to get a sample.

• Biased

• Unbiased

Biased or Unbiased?

John wants to find out what the favorite soda flavor is at Menifee County. He decides to ask all the students in Mr. Goldsmith's class as a sample group.

• Biased

• Unbiased

A student surveys mathematics teachers to get their opinion on teaching.  What is the sample?

• All teachers in the world.

• All teachers within the school.

• All mathematics  teachers in the school.

• All teachers except mathematics teachers.

_________ is a sample in which each individual or object in the entire population has na equal chance of being selected.

• Sample

• Population

• Random Sample

• Quartile