5.1 Sampling and Bias

Source of bias that occurs when an individual chosen for the sample CAN'T be contacted or refuses to cooperate.

• Response Bias
• Undercoverage
• Nonresponse
• Voluntary Response

Tags

CCSS.HSS.IC.B.3

Source of bias in which some groups of populations are LEFT OUT of the selection process

• Response Bias
• Undercoverage
• Convenience Sampling
• Voluntary Response

Tags

CCSS.HSS.IC.B.3

Source of bias in which people CHOOSE to respond and usually only people with very strong opinions respond

• Response Bias
• Undercoverage
• Convenience Sampling
• Voluntary Response

Source of bias that occurs when you ask people who are EASY to ask

• Response Bias
• Convenience Sampling
• Nonresponse
• Voluntary Response

When one examines the entire population instead of a subgroup of the population, this is called a ____________.

• Sampling

• Census

• Bias

• Observational Study

A ___ is a small portion of the population used to gather data from.

• Systematic Sampling Method
• Sample
• Population
• Bias

Tags

CCSS.HSS.IC.B.3

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

Exit polls (where the surveyor asks those who are leaving the poll booths on election day) are a form of:

• Voluntary Response
• Convenience Sampling
• Simple Random Sampling
• Systematic Sampling

Tags

CCSS.7.SP.A.1

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.
She selects the first five who raise their hands.

• Systematic
• Convenience
• Voluntary Response
• Simple Random

Tags

CCSS.7.SP.A.1

Which scenario would produce the least biased results?

• asking athletes at a gym what their favorite television show is
• asking shoppers at a store where their favorite place to shop is
• asking fans at a baseball game who their favorite baseball team is
• asking students in a college library what their favorite college sports team is

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

Researchers have linked an increase in the incidence of breast cancer in Italy to dioxin released by an industrial accident in 1976. The study identified 981 women who lived near the site of the industrial explosion and were under age 40 at the time. Fifteen of the women had developed breast cancer, at an unusually young average age of 45. Medical records showed that these women had heightened concentrations of dioxin in their blood, and that each 10-fold increase in dioxin level was associated with a doubling of the risk of breast cancer. (Science News, Aug. 3, 2002)

• Observational Study

• Experiment

• Survey

• Research Inquiry