a bus comes by every 15 minutes. the times from when a person arives at the busstop until the bus arrives follows a uniform distribution from 0 to 15 minutes. a person arrives at the bus stop at a randomly selected time. round to 4 decimal places where possible. the mean of this distribution is the standard deviation is the probability that the person will wait more than 7 minutes is suppose that the person has already been waiting for 2.3 minutes. find the probability that the person's total waiting time will be between 5.8 and 7 minutes 38% of all customers wait at least how long for the train? minutes.