AnswersNC-Math 4 CRConsiderations When Sampling

Considerations When Sampling Answers

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1
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The sample for a study exhibits undercoverage bias. Select the statement that best describes the bias in the study.

A
There are not enough subjects in the sample.
B
Many of the subjects in the study did not answer every question on the survey.
C
The subjects in the study are not representative of the population, because some members of the population were not able to participate in the study.
D
The subjects in the study are not representative of the population, because some members of the population refused to take part in the study.
2
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The results of a study exhibit nonresponse bias. Select the statement that best describes the bias in the study.

A
There are not enough subjects in the sample.
B
Many of the subjects in the study did not answer every question on the survey.
C
The subjects in the study are not representative of the population, because some members of the population were not able to complete a survey.
D
The subjects in the study are not representative of the population, because some members of the population could not be contacted or refused to answer the survey.
3

The results of a study exhibit response bias. Select the statement that best describes the bias in the study.

A
There were not enough subjects who chose to respond to a survey that was sent as part of the study.
B
The interviewer for the study was the boss of the subjects.
C
The interviewer for the study did not record the responses of the subjects accurately.
D
There was a significant amount of people who declined to participate in the study.
4

Alyssa created a new how-to video for her DIY website and is curious how much her viewers like the new video. She decides to poll the next 100 viewers who share her video on social media. Eighty-five percent of the viewers she polled responded that they "loved” the new video. Which statement best describes the results of this poll?

A
Exactly 85% of all viewers that viewed the video loved it.
B
It is most likely that more than 85% of all viewers that viewed the video actually loved it.
C
It is most likely that less than 85% of all viewers that viewed the video actually loved it.
D
Exactly 15% of all viewers that viewed the video did not love it.
5

A school theater director is planning a voluntary trip to New York City for students. He sends a poll regarding interest in the trip via text message to all parent phone numbers on record. The poll showed that 68% of parents were interested in the trip. Which statement best describes the results of this poll?

A
Sixty-eight percent is likely a good estimate for the percentage of parents interested in the trip.
B
Sixty-eight percent is likely an overestimate for the percentage of parents interested in the trip.
C
Sixty-eight percent is likely an underestimate for the percentage of parents interested in the trip.
D
There is not enough information to assess the results of the study.
6

A school guidance counselor is researching the number of high school students who play an online video game that is aimed at much younger children. She polls 100 seniors that regularly meet in her office to gather data for her study. Which statement best describes the results of this poll?

A
The results of the poll are likely representative of the number of high school students who play the game.
B
The results of the poll are likely an overestimation of the number of high school students who play the game.
C
The results of the poll are likely an underestimation of the number of high school students who play the game.
D
There is not enough information to assess the results of the study.
7

A school guidance counselor is researching the number of high school students who have a part-time job. She emails a survey to 500 students that contains the question "Given that studies show that holding a part-time job helps with college admissions, do you have a part-time job or want a part-time job?” Select the type of bias most likely to affect the results of the survey.

A
Response bias
B
Nonresponse bias
C
Question wording bias
D
Undercoverage bias
8

The sample for a study exhibits question wording bias. Select the statement that best describes the bias in the study.

A
Each subject in the study completes one of three different surveys. Each survey asks the same questions but using slightly different wording.
B
One or more questions on the survey is vague, confusing, leading, or lacks information.
C
The questions on the survey are short answer rather than yes or no questions.
D
The survey is more than 20 questions long.
9

A city council member wants to know how the people in her city feel about the condition of the city parks. She emails a survey to the home address of all residents who take part in a city recreational sport league. Select the type of bias most likely to affect the results of the survey.

A
Response bias
B
Nonresponse bias
C
Question wording bias
D
Undercoverage bias

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