<< Hello, I would need help to solve the following question. At a Web server every 30 seconds arrive in average 3 requests. I want to calculate the probability of waiting for more than 15 minutes so that 80 requests arrive.
Thank you very much. Marck. >> First of all, you need the standard deviation. If that is zero (so a demon watches all the requests and adds fake one if there is less or deletes the ones over 3 / 30 sec) then the probability is zero, in 15 minutes 90 request will arrive. Having real std I would use the Chebyshev theorem as most safe: The proportion of values which fall outside k standard deviations of the mean will be less than 1/k^2 . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
