The Information Systems Audit and Control Association surveyed office workers tolearn about the anticipated usage of office computers for personal holiday shopping (USatoday, November 11, 2009). Assume that the number of hours a worker spends doingholiday shopping on an office computer follows an exponential distribution.a. The study reported that there is a .53 probability that a worker uses an office computerfor holiday shopping 5 hours or less. Is the mean time spent using an office computerfor 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 an officecomputer for holiday shopping more than 10 hours?

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 11, 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 an 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 an office
computer for holiday shopping more than 10 hours?

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