C.1 Quiz

_______ is a part of a group being surveyed.

• Sample
• Population
• Random Sample
• Quartile

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

• Sample
• Population
• Random Sample
• Quartile

_______ is the entire group of objects or individuals considered for a survey.

• Sample
• Population
• Random Sample
• Quartile

4.  Carlos wants to know the favorite sport of people at his school so he asks his baseball team.

• A. Biased
• B. Unbiased

True or False: all samples lead to a good prediction about an entire population.

• True
• False

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

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

• Biased
• Unbiased
• Representative
• Numerical

Why do we randomly select our samples?

• for control
• reduce bias
• so we don't get the same answers from everyone
• to eliminate confounding results

At a farm there were 7 cows for every 2 horses. If there was 21 cows estimate how many horses there would be?

• 9

• 3

• 6

• 14

A restaurant offers many drink options in one day they sold 50 drinks. Out of those 50 drinks 15 of them were apple juice. If they had sold 250 drinks, estimate how many would be apple juice.

• 65

• 5

• 150

• 75