Sampling and Population

Population or Sample?

A recent survey of 2625 elementary school children found that 28% of the children could be classified obese.

• Population

• Sample

Population or Sample? The average weight of every person entering the mall within 3 hour period was 146 lb.

• Population

• Sample

Population or Sample?

A factory overseer selects 40 threaded rods at random from those produced that week at the factory, then she tests their tensile strength.

• Population

• Sample

Population or Sample?

All of the teachers in a school are surveyed on their meeting time preferences.

• Population

• Sample

Population or Sample?

Every fifth customer exiting a restaurant is surveyed on how well they liked the food.

• Population

• Sample

Population or Sample?

A police officer measures the speed of all the cars that pass a specific point on the road during his shift.

• Population

• Sample

A beverage company wanted to see if people in the United States liked their new logo.
Which choice best represents a population?

• A selection of logo artists.

• Every person in the United States.

• A selection of shoppers from different shoppers from different states.

• 3,800 children age 5-15

A musician wanted to see what people who bought his last album thought about the songs.
Which choice best represents a sample?

• Every person who bought the album.

• A selection of people who didn't want to buy the album.

• 250 girls who bought the album.

• A selection of 3,294 people who bought the album.

A toy store owner is tracking how much kids spend each month on toys.
Which choice best represents a population?

• All of the kids who buy toys.

• 227 rich kids.

• 228 boys age 7-15.

• 235 kids from age 10 to 15.

A mayor wanted to see if the people in his town thought he was doing a food job.
Which choice best represents a sample?

• 1,000 unemployed voters

• The mayor's family

• The residents of the town

• 242 voters