a. A random variable x has the following empirical distribution.
x 1 2 4 6 8 10 f(x) 0.10 0.20 0.25 0.20 0.15 0.10
Plot the cumulative distribution and find the values of x corresponding to the following two digit random numbers: 05, 45, 62, 93 (8 Marks)
b. The distribution of inter arrival times in a single server model is:
T : 1 2 3 f(t) : ¼ ½ ¼
and the distribution service time is:
S : 1 2 3 f(s) : ½ ¼ ¼
Develop a simulation table using the two digit random numbers 12, 40, 48, 93, 61, 17, 55, 21, 85, 88 to generate arrivals and 54, 90, 18, 38, 16, 87, 91, 41, 54, 11 to generate the corresponding service time. Compute the average waiting time in queue. (12 Marks)
3
QUESTION – 20 MARKS
a. A bakery keeps stock of a popular brand of coke. Daily demand based on the part experience is given below:
Daily demand 0 15 25 35 45 50
Probability 0.01 0.15 0.20 0.50 0.12 0.02
Using the following sequence of random numbers, simulate the demand for the next 10 days: 48,78, 09, 87, 99, 77, 15, 14, 68 and 89
Find out the stock situation if the owner of the bakery decides to make 35 cakes every day. The unmet demand on any day is lost. (10 Marks)
What is the average stock required? (2 Marks)
b. What is the importance of verification and validation of simulation models? (2 Marks) c. Differentiate between verification and validation as used in the context of simulation. (2 Marks) d. Highlight: i. Merits of simulation languages. (2 Marks) ii. Merits of general purpose languages. (2 Marks)
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