10.1 Questions

Decide if the situation is a population, a biased sample or unbiased sample:

An airline surveys passengers from a flight that is on time to determine if passengers on all flights are satisfied.

• Population

• Biased Sample

• Unbiased Sample

Decide if the situation is a population, a biased sample or unbiased sample:

A newspaper randomly chooses 100 names from its subscriber database and then surveys those subscribers to find if they read the restaurant reviews.

• Population

• Biased Sample

• Unbiased Sample

Decide if the situation is a population, a biased sample or unbiased sample:

The manager of a bookstore sends a survey to 150 customers who were randomly selected from a customer list

• Population

• Biased Sample

• Unbiased Sample

Decide if the situation is a population, a biased sample or unbiased sample:

A team of researchers surveys 200 people at a multiplex movie theater to find our how much money state residents spend on entertainment.

• Population

• Biased Sample

• Unbiased Sample

Which sampling method will be more unbiased and represent the entire population?

• Method A: Survey 40 students in 2 7th grade math classes.

  72 % are satisfied with the food in the cafeteria

• Method B: Survey 65 students from a list of all student in the school.

  85% are satisfied with the food in the cafeteria

Which sampling method will be more unbiased and represent the entire population?

• Method c: Telephone 100 randomly chosen voters who live in the town.

  54% plan to vote for the incumbent mayor

• Method D: Telephone 70 people who have lived in the town for more than 25 years.

  45% plan to vote for the incumbent mayor

Decide if the situation is a population, a biased sample or unbiased sample:

A town official surveys 50 people in a library to decide if town residents want the library services and facilities expanded.

• Population

• Biased Sample

• Unbiased Sample

Decide if the situation is a population, a biased sample or unbiased sample:

A cable television company randomly calls 200 customers and asks them if they are satisfied with their service.

• Population

• Biased Sample

• Unbiased Sample

Decide if the situation is a population, a biased sample or unbiased sample:

Carlos chooses 50 movies at random from a list of all his movies to determine the average runtime of the movies in his collection

• Population

• Biased Sample

• Unbiased Sample

Decide if the situation is a population, a biased sample or unbiased sample:

Lisa asks 75 people at a neighborhood fast food restaurant about the last meal they ate, in order to find out the eating habits of people in her neighborhood.

• Population

• Biased Sample

• Unbiased Sample