what is the mean length of time spent queueing what is the mean length of queueing time of queueing how to find the mean length of time spent waiting in a queueing system rss means service time what is the mean length of time spent queueing in a $m/e/1$ system? why is it important for us to find the gamma distribution in this equation? average time spent waiting time what is mean length of time spent queueing for a queue? average length of time spent queueing what is the mean length of time spent queue mean length of time in system what is the length of time spent queueing in a queueing system how to find service time of a queueing system what is the pgf for the number of customers that leave at equilibrium in a queueing system? what is the means of the length of service time queue what is meant by the average length of time spent queueing mean duration of wait time what is a mean length of time spent queueing for a system what is the mean time spent during a service time? what is the value of wait time for queueing what is the mean length of service time of queueing in an e2