Question

An industrial engineer working at the bank wants to work on reducing the waiting times of customers in the system. For this purpose, it has modeled the system as simulation as M / M / 1 queue system. By running the simulation model 10 times, it recorded the average waiting times of the customers. According to these data, at the end of a day, estimate the average waiting time of a customer and get the confidence interval for the average waiting time of a customer at 90% confidence level.

Repeat	1	2	3	4	5	6	7	8	9	10
Average waiting time in the queue (min)	1.55	1.70	1.24	2.14	2.00	1.59	2.69	2.76	1.80	2.50

Answer 1

Let the observation is denoted by Xi