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Suppose that we modify the M/M/2 queueing system as follows: when a server is free, he assists (if needed) the other server, so that the service time, S, has an exponential distribution with parameter 2μ. If a new customer arrives while a customer is being served by the two servers at the same time, then one the servers starts serving the new customer.
(a) Calculate the limiting probabilities if we suppose that A μ.
(b) Suppose that the system capacity is c = 2 and that λ = μ1. Calculate the average number of customers in the system in stationary regime, given that the system is not full.
The following frequency distribution shows the time (in minutes) that a sample of students uses the computer terminals per day. Compute the coefficient of variation.
usfec rents the flatbed trailers on which the organizations participating in the parade build their floats. the
How many cities have a population of at least 100,000 but less than 1,000,000? What percentage of cities are in this group?
while writing an article on the high cost of college education a reporter took a random sample of the cost of new
What information would you need to determine the probability that postage forone particular week will exceed $400? Why wasn't this information required for(a)
A political pollster randomly selects a sample of 100 voters each day for 8 successive days and asks how many will vote for the incumbent. The pollster wishes to construct a p chart to see if the percentage favoring the incumbent candidate is too err..
The mean of a standard normal probability distribution.
Find the proportion of working days in which anywhere from 750 to 850 tons is mined. Find the probability that on a given day, the yield will be below 665 tons.
For a standard normal distribution, findout the percentage of data that are among 3 standard deviation below the mean also1 standard deviation above the mean.
find the indicated quantities given that x is a normal random variable with a mean of 30 and a standard deviation of
Find the equilibrium bidding strategies for the first- and second-price auctions. Compute the expected revenue associated with each auction format.
An employee is to be selected randomly from this population. Let A be the event that the employee scores a passing grade on the exam and let M be the event that a male is selected. Are the events A and M independent
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