You obtain the average delay in queue (minutes) for 8 independent replications of a simulation model of a popular ride at an amusement park, modeled as a terminating system.
33.234 21.764 28.112 21.205
19.547 22.529 28.082 26.34
a. What is the 95% confidence interval for the true average delay in queue?
b. What total number of replications is required to increase the precision of the estimate and reduce the confidence interval half-length to 1.5 for the same 95% confidence level?