Lab 2 Questions

The Gallup panel is a sample of approximately 100,000 American adults. From which two sampling frames is this sample selected?

• A list of registered voters and a list of addresses

• A list of registered voters and a list of phone numbers

• A list of addresses and a list of phone numbers

Is the method of selecting American adults for the Gallup Panel from the sampling frames a biased or unbiased design?

• A biased sampling design

• An unbiased sampling design

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

When Gallup surveys the Gallup Panel members, nonresponse is a potential issue. In surveys where the respondents are not representative of the target population of American adults, which variables does Gallup use to weight the sample of respondents? Select all that apply.

• Gender

• Age

• Race

• None of the variables above are considered when weighting

By weighting survey responses using demographic variables to account for the missing data from survey nonresponse, which mechanism is Gallup assuming to explain the nonresponse?

• Missing completely at random

• Missing at random

• Missing not at random

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CCSS.HSS.IC.B.3

Are the data analyzed in this research produced from an observational study or an experiment? Note: The Measurements section of the abstract should help you discern this answer.

• An observational study

• An experiment

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CCSS.HSS.IC.B.3

The following quote comes from the full journal article: "9.2 million persons aged 40 to 69 years who were registered with the UK National Health Service (NHS) and resided within 40 km of 1 of 22 assessment centers across the United Kingdom (England, Wales, and Scotland) were invited to participate in the study." The target population is British adults aged 40 to 69. The sample is drawn from those adults who live within 40 kilometers of an assessment center. This is an example of:

• undercoverage

• overcoverage

• a sample with no under- or overcoverage

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Of the 9.2 million adults invited to participate in the study, only about 500,000 consented to participate in the study. True or false: This is a potential source of selection bias.

• True

• False

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CCSS.HSS.IC.B.3

Of the approximately 500,000 participants in the study, there were 2,193 individuals with missing or incomplete tea intake information. These individuals were excluded from the final dataset. Which mechanism for the nonresponse must be assumed to justify excluding these individuals?

• Missing completely at random

• Missing at random

• Missing not at random

From the target population of roughly 368,000 public college and university students in Florida, only 8,800 responded to the email invitation to complete this survey. These 8,800 responses could be viewed as a:

• convenience sample

• voluntary response sample

• simple random sample

• stratified random sample

• cluster sample

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

The article reports that the response rates to this survey differ significantly across some of the public colleges and universities in Florida. Given this information, which mechanism could NOT be assumed to explain the nonresponse?

• Missing completely at random

• Missing at random

• Missing not at random

Tags

CCSS.HSS.IC.B.3