Suppose we want to estimate the expected average waiting time for the first customers at a bank. We make independent replications of the system, each initialized empty and idle and consisting of 100 waiting times. The resulting replicate means are: i 1 2 3 4
Zi 5.2 4.3 3.1 4.2

Required:
Find a 90% confidence interval for the mean average waiting time for the first 100 customers.

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]