Sampling & Bias

_______ 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 na 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

The manager of a book store surveys people who buy mystery novels to see if the store should expand its hours.  What is the population?

• People who visit the bookstore.
• People who buy mystery novels.
• Residents of the town
• People who like to read.

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.

A computer manufacturer surveys its customers who purchased laptop computers to ask what software the company should include with its computer.  Identify the population.

• Customers who purchased laptop computers.
• Customers of the store.
• Customers who are interested in software.
• Computer manufacturers

A new cable TV station wants to study the viewing habits of households.  The station surveys every household that purchased a new TV within the last 2 years in New York.  Is this random sampling?

• Yes
• No

A U.S. senator from Maine wants to find out the opinion of the voters in his state on issues concerning education.  The office of the senator sends out a survey to a random sample of registered voters in Maine.  Is this random sampling?

• Yes
• No

The TV station wants to get the opinion of viewers on the look of a new game-show set.  The station's staff calls random people in the phone book.  Is this biased or unbiased?

• Biased
• Unbiased

A manager samples receipts of every fifth person in line. Out of 50 people, 4 had a mispriced item. If 600 people go to the store each day, how many can you expect to have a mispriced item?

• 50 people

• 80 people

• 48 people

• 12 people