A study conducted at Stanford University in 2005 wanted to evaluate what percentage of students had used the drug Ecstasy. Two assistants were stationed on the main campus plaza and instructed to interview all students who passed through at specified times. As it turned out, 19% of 369 students interviewed said they had used Ecstasy at least once. Does the investigator’s procedure give a probability sample of Stanford students? Answer yes or no, and explain. If this is not a probability sample, what term best describes it?
A study conducted at Stanford University in 2005 wanted to evaluate what percentage of students had used the drug Ecstasy. Two assistants were stationed on the main campus plaza and instructed to interview all students who passed through at specified times. As it turned out, 19% of 369 students interviewed said they had used Ecstasy at least once. Does the investigator’s procedure give a probability sample of Stanford students? Answer yes or no, and explain. If this is not a probability sample, what term best describes it?
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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Question
A study conducted at Stanford University in 2005 wanted to evaluate what percentage
of students had used the drug Ecstasy. Two assistants were stationed on the main
campus plaza and instructed to interview all students who passed through at specified
times. As it turned out, 19% of 369 students interviewed said they had used Ecstasy at
least once. Does the investigator’s procedure give a probability sample of Stanford
students? Answer yes or no, and explain. If this is not a probability sample, what term
best describes it?
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