Question: According to an online survey by Harris Interactive for job

According to an online survey by Harris Interactive for job site CareerBuilder.com, more than half of IT (information technology) workers say they have fallen asleep at work ( InformationWeek , September 27, 2007). Sixty-four percent of government workers admitted to falling asleep on the job. Consider the following contingency table that is representative of the survey results.


a. Convert the contingency table into a joint probability table.
b. What is the probability that a randomly selected worker is an IT professional?
c. What is the probability that a randomly selected worker slept on the job?
d. If a randomly selected worker slept on the job, what is the probability that he/she is an IT professional?
e. If a randomly selected worker is a government professional, what is the probability that he/she slept on the job?
f. Are the events “IT Professional” and “Slept on the Job” independent? Explain usingprobabilities.
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  • CreatedJanuary 28, 2015
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