Open Model $3-1.$doe and make the following modifications $($this model will be "Model A$")$:

Set run length to $720$ minutes.

Use $15$ replications.

Change Create interarrivals to Expo$(10).$

Save this model as "Model A$".$

Make the following modification to "Model A$"($this model will be "Model B$")$:

Change the processing time at the Drilling Center to TRIA$(2,3,4).$

Save this model as "Model B$".$

a$.(10$ points$)$ Report the average time in system for Models A and B$.$ How do they

compare? Print and submit the corresponding Arena reports and label your answers.

b$.(15$ points$)$ Use Arena's Output Analyzer to determine whether there is a significant

difference between Models A and B$,$ in terms of average time in system. Use the

"LUMPED" option and test at level $0\mathrm{.}95.$ Turn in the results of the output analysis from

the Output Analyzer $($graphics and text$)$ and explicitly state in words whether there is

a statistical difference in means between the two models at level $0\mathrm{.}95.$ Hint: In order

to use the Output Analyzer, you must first modify your Arena models to save the

values of "Time in System" for each replication $($i$.$e$.$ you need to create$/$save $.$dat

files$).$