Populations and Samples

The owners of a sports stadium wanted to predict what additional refreshment options would sell well. They selected 80 seat numbers at random and surveyed the occupants of those seats.

• The population is the occupants of all seats in the sports stadium; the sample is the occupants of the 80 selected seats.

• The population is the occupants of the 80 selected seats; the sample is the refreshment options.

• The population is all people who buy refreshments in the sports stadium; the sample is the occupants of the 80 selected seats.

• None of these.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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

• The population is all threaded rods in the world; the sample is all threaded rods produced at the factory.

• The population is threaded rods produced at the factory that week; the sample is the 40 threaded rods selected.

• The population is all threaded rods produced at the factory in a year; the sample is all threaded rods produced at the factory.

• None of these.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

A pediatrician randomly selected 10 parents of his patients. Then he surveyed the parents about their opinions of different kinds of diapers.

• The population is the pediatrician's patients; the sample is the 10 patients selected.

• The population is the parents of the pediatrician's patients who wear diapers; the sample is the parents of all of the pediatrician's patients.

• The population is the parents of the pediatrician's patients; the sample is the 10 parents of patients selected.

• None of these.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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.

• None of these.

• The population is every car at the factory; the sample is the 30 selected points.

• The population is every car at the factory; the sample is the 1 car she is curious about.

• The population is every possible point on the car; the sample is the 30 selected points.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Administrators at Riverview High School surveyed a random sample of 100 of their seniors to see how seniors at the school felt about the lunch offering at the school's cafeteria.

• The population is all seniors at Riverview High; the sample is the 100 seniors surveyed.

• The population is all the seniors in high school in the United States; the sample is the seniors at Riverview High.

• The population is all students at Riverview High; the sample is all of the seniors at Riverview High.

• None of these.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

A safety inspector conducts air quality tests on a randomly selected group of 7 classrooms at an elementary school. Identify the population and sample in this setting.

• The population is all the classrooms in the district; the sample is the 7 classrooms selected.

• The population is all classrooms in the elementary school; the sample is the 7 classrooms selected.

• The population is all elementary students in the school; the sample is the students in the 7 classrooms selected.

• None of these.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1