(a): Does your telephone number end in an even digit? Question (b): Have you ever used cocaine?...
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Question:
(a): Does your telephone number end in an even digit?
Question (b): Have you ever used cocaine?”
Because the respondent can answer truthfully without revealing his or her cocaine use, the incentive to lie is removed. Researchers hope respondents will tell the truth.
You may assume that respondents are truthful and that telephone numbers are equally likely to be odd or even. Let p be the probability that a randomly selected person
has used cocaine.
(a) What is the probability that a randomly selected person answers "yes"?
(b) Suppose we survey 100 people. Let X be the number who answers "yes". What
is the distribution of X?
Related Book For
Advanced Accounting
ISBN: 9780132568968
11th Edition
Authors: Floyd A. Beams, Joseph H. Anthony, Bruce Bettinghaus, Kenneth Smith
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