Question: The Information Systems Audit and Control Association surveyed office workers to learn about the anticipated usage of office computers for personal holiday shopping (USA Today. November I I. 2009). Assume that the number of hours a worker spends doing holiday shopping on an office computer follows an exponential distribution.
a. The study reported that there is a .53 probability that a worker uses the office computer for holiday shopping 5 hours or less. Is the mean time spent using an office computer for holiday shopping closest to 5.8. 6.2. 6.6. or 7 hours?
b. Using the mean time from part (a). what is the probability that a worker uses the office computer for holiday shopping more than 10 hours?
c. What is the probability that a water uses the office computer for holiday shopping between four and eight hours?