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One of the main lessons of queueing theory (Chaps. 17 and 18) is that the amount of variability in the service times and interarrival times has a substantial impact on the measures of performance of the queueing system. Significantly decreasing variability helps considerably. This phenomenon is well illustrated by the M/G/1 queueing model presented at the beginning of Sec. 17.7. For this model, the four fundamental measures of performance (L, Lq, W, and Wq) are expressed directly in terms of the variance of service times (σ2) so we can see immediately what the impact of decreasing σ2 would be. Consider an M/G/1 queueing system with mean arrival rate λ = 0.8 and mean service rate μ = 1, so the utilization factor is
How large should n be so that the standard deviation of is no more than 0.01 and sampling distribution
you are a manager of a 7-eleven. you have determined the probability a customer buys gasoline 0.32. you have also
The following 4 questions (Q1 to Q4) are based on the following information:You and your friends have decided to go to The Kentucky Derby. There are 12 horses inthe race. How many ways can the horses come in first, second, or third?
As a Staff I assigned to the audit of a publicly traded company, your senior has asked you to evaluate both share-based payment reporting and special purpose entities (SPE) reporting for the company.
A journal polled its readers to determine the proportion of wives who, if given a second chance, would marry their husband again.
A comparison the use of visuals in professional, popular and pedagogic science. Word length: 2000 words
Assume the observed value of the test statistic is 1.53. What is the smallest level for which there is sufficient evidence to reject H 0 (i.e. the p-value for this test)?
1. do this exercise by hand. a famous brand-name manufacturer wants to know whether people prefer nibbles or wribbles.
Do the sales prices of houses in a given community vary systematically with their sizes (as measured in square feet)?
How many branch offices were involved in the study and compute the F statistic and test the significance of the relationship at a .05 level of significance.
find the indicated iq score. the graph to the right depicts iq score of adults and those scores are normally
a sample of 14 joint specimens of a particular type gave a sample mean proportional limit stress of 8.48 mpa and a
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