Quiz_01A - 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: Average age of people in Salt Lake City. Sample: 10 people picked randomly from all people living in Salt Lake City. Population: All people living in Salt Lake City. A) Representative B) Not representative Feedback: Representative: the sample of 10 would be representative of all people living in Salt Lake City 2. Decide if the sample is representative (or not) of the population for the question of interest. Question: Average daily hours of sleep over a one year period. Sample: Hours of sleep for 100 randomly selected students the night before an exam. Population: All students in the university. A) Representative B) Not representative Feedback: Not Representative: taking a sample of students the night before an exam would most likely not be representative of a usual night's sleep over the course of a year Points Awarded 8.00 Points Missed 2.00 Percentage 80.0% Points Earned: 0.0/1.0 Correct Answer(s): A Points Earned: 1.0/1.0 Correct Answer(s): B Unit Quiz 01 https://cms.psu.edu/Section/Assessment/Question/GradeDelivery.aspx?entryId=433E57EB0D76. .. 1 of 4 9/27/2010 11:15 PM
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3. 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. 4.
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Quiz_01A - Unit Quiz 01

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