Biased Sample Random Sample

Choose the best sample.

• Sample A

• Sample B

Choose the best sample.

• Sample A

• Sample B

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

• Random sample.

• Biased sample.

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

• Unbiased sample

• Biased sample

A school surveys all 7th grade boys to determine what to sell in the school store.  This sample is _________.

• Biased

• Unbiased

• Representative

• Peanut butter cups

Choose the true statement(s) about the census and sample shown.

• The sample could be considered too small.

• The sample is biased because is does not include everyone.

• The sample is representative of the population's sub-groups.

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.

I drew 10 names from a hat containing the names of every student that I teach, what type of sample have I taken?

• A random sample.

• A biased sample.

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

• Biased

• Unbiased

• Representative

• Numerical

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

• Biased Sample

• Unbiased Sample