Actual lengths of stay at a hospital’s emergency department in 2009 are shown in the following table (rounded to the nearest hour). Length of stay is the total of wait and service times. Some longer stays are also approximated as 15 hours in this table. a.) What is the probability that someone would stay at most 5 hours? b.) What is the probability that an individual would have to stay longer than eight hours? c.) What is your expected length of stay at this hospital? d.)What is the variance, interpret this value in the context of the problem.
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