Population or Sample

Lucio wants to know whether the food he serves in his restaurant are within a safe range of temperatures. He randomly selects 70 entrees and measures their temperatures just before he serves them to his customers.

• The population is all of the hot entrees Lucio serves; the sample is the entrees that are a safe temperature.

• The population is the 70 selected entrees; the sample is the entrees that are a safe temperature.

• The population is all of the entrees Lucio serves; the sample is the 70 selected entrees.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

A group of librarians are interested in the numbers of books and other media that adult patrons check out from their library. They examine the checkout records of 150 randomly selected adult patrons.

• The population is all adult patrons of the library; the sample is the 150 patrons selected.

• The population is all patrons of the library; the sample is the adult patrons of the library

• The population is all patrons who check out at least 1 book from the library; the sample is the 150 patrons selected.

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 ever produced at the factory; the sample is the threaded rods produced that week.

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

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.

• The population is every possible point on the car; 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.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

The state Department of Transportation wants to know about out-of-state vehicles that pass over a toll bridge with several lanes. A camera installed over one lane of the bridge photographs the license plate of every tenth vehicle that passes through that lane.

• The population is all of the vehicles that pass over the toll bridge; the sample is vehicles from the lane with the camera.

• The population is all of the vehicles that pass through the lane with the camera; the sample is the group of every tenth vehicle that passes through the lane.

• The population is all of the out-of-state vehicles; the sample is the vehicles that pass over the toll bridge.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

David hosts a podcast and he is curious how much his listeners like his show. He decides to start with an online poll. He asks his listeners to visit his website and participate in the poll. The poll shows that 89% percent of the 200 respondents "love" his show. What is the most concerning source of bias in this scenario?

• Response bias

• Undercoverage

• Voluntary Response Sampling

Tags

CCSS.HSS.IC.B.3

A senator wanted to know about how people in her state felt about internet privacy issues. She conducted a poll by calling 100 people whose names were randomly sampled from the phone book (note that mobile phones and unlisted numbers aren't in phone books). The senator's office called those numbers until they got a response from all 100 people chosen. The poll showed that 42% of respondents were "very concerned" about internet privacy. What is the most concerning source of bias?

• small sample population

• voluntary response sample

• excluded certain groups

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

After the 2000 census, the United States Census Bureau reported that 7.4% of Georgia residents were between the ages of 10 and 14. 10. What is the population for this survey?

• Every resident in Georgia.

• Every person that went to Disney World.

• Every resident of the United States

• Nobody

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

ABC Family is a television channel that targets families and young adults to view their station. ABC Family regularly posts online poll questions to their website. In 2010, ABC Family polled their female viewers to ask about airing Rated “R” movies after 8pm on their channel. Almost 200,000 people responded, and 85% of them disagreed with airing Rated “R” movies. What bias is present?

• Voluntary sample bias.

• Small sample bias.

• Addressed towards a certain group. Excludes men.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

The City of Smallville wants to know how its citizens feel about Superman. Surveyors stand in the Smallville Mall from 8am-11am on a Tuesday morning and ask people their opinion. 80% of the surveyed people said they disagreed with having an alien as their protector. What type of sample is this?

• Simple Random

• Convenience sample.

• Biased sample.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1