Population and sampling

Complete the definition:

A _________ consists of all subjects (human or otherwise) that are being studied

• Statistics

• Number

• People

• Population

• Pueblo

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?

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

Complete the definition:

A _______ is a subset of a population

• sample

• sampel

• people

• statistics

• group

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

Population or Sample?

A quality control engineer is curious about the thickness of paint on a car at her factory. She randomly selects 30 points on the car and measures the paint thickness at each of those points.

• Population

• Sample

Population or Sample?

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

• Population

• Sample

A gaming website wanted to find out which console its visitors owned.
Which choice best represents the population?

• Visitors to the 3DS section.
• All of the website visitors.
• Visitors to the PS4 section.
• Visitors who are on the website for more than 5 minutes.

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 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.