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**ShaunW** Work schedules: Suppose the length of time for a particular service (say 7500 mile auto maintenance) has a mean of 1.5 hours and SD equal to 1 hour. Because there are occasional complications, this distribution is skewed to the right, i.e., has a longer right tail than left tail (some services run over 3 hours, but none run under 0 hours). Suppose there are 60 services scheduled for a day (8 hours). There are 12 workers available, each on an eight hour shift. Find the probability that overtime will be required. (Do you think it is OK to use a normal distribution? Why?)