according to an online survey by harris interactive for job sitecareerbuilder.co
ID: 3317996 • Letter: A
Question
according to an online survey by harris interactive for job sitecareerbuilder.com, more than half of IT workers say they have fallen asleep at work. 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. what is the probablity that a randomly selected worker slept on the job and he/she is an IT professional? What is the probability a randomly selected worker either slept on the or he/she is an IT professional?
slept on job job category IT Professional Goverment Professional yes 144 106 no 56 94Explanation / Answer
probablity that a randomly selected worker slept on the job and he/she is an IT professional = 144/ (144+56+106+94) = 0.36
probability a randomly selected worker either slept on the or he/she is an IT professional = P( slept on job) + P( it professional ) - P(slept on job & it professional) = (144+106) + (144+56) - (144) / (144+56+106+94) = 0.765
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