Quiz_01B - Unit Quiz 01

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1. Decide if the sample is representative (or not) of the population for the question of interest. Question: Proportion of people who intend to vote in the next presidential election. Sample: 100 baseball fans at a baseball game. Population: All voters in the next presidential election. A) Representative B) Not representative Feedback: Not representative: fans at a baseball game may not be old enough to vote or enough voter eligible. 2. A survey based on a random sample of 1000 students found that 1% of these students, when asked by the professor doing the survey, admitted to having cheated on at least one exam. The results of this study, if applied to all students in the university, are questionable because of A) lack of accuracy. B) selection bias. C) nonresponse bias. D) response bias. Feedback: Quite possibly students would not respond honestly to their professor's inquiry resulting in response bias. 3. When a representative sample is selected but only a small proportion contacted actually participate in the study, the problem is called A) lack of accuracy. B) selection bias. C) nonresponse bias. D) response bias. Points Awarded 8.00 Points Missed 2.00 Percentage 80.0% Points Earned: 1.0/1.0 Correct Answer(s): B Points Earned: 0.0/1.0 Correct Answer(s): D Unit Quiz 01 https://cms.psu.edu/Section/Assessment/Question/GradeDelivery.aspx?entryId=433E57EB0D76. .. 1 of 4 9/27/2010 11:16 PM
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Feedback: When a large number of subjects sampled do not participate in the study/survey, then the problem of nonresponse bias arise 4. When a representative sample is selected but respondents give answers that are different from their true opinions, the problem is called A) lack of accuracy. B) selection bias.
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Quiz_01B - Unit Quiz 01

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