ISYE 6644 - GT CERTIFICATION SCRIPT
2026 QUESTIONS WITH SOLUTIONS
GRADED A+
◍ Factorial Design.
Answer: Determine effects of factors.
◍ Optimal solution.
Answer: Feasible solution with the best objective value (output of an
optimization model)
◍ T-Statistic.
Answer: The coefficient divided by its standard error
◍ Which block is NOT in the Blocks template?.
Answer: Process Block- No such thing, but the Process module is in the
Basic Process panelBlocks template:- Seize block- Delay block- Release
block- Alter block- Queue block
◍ Which module/spreadsheet is NOT in the Advanced Process panel?.
Answer: Process Model - The process model is in the Basic Process
panel.Advanced Process Panel-Seize module-Delay module-Release
module-Expression spreadsheets-Failure spreadsheets
◍ Consider the Arena expression DISC(0.3, 1, 0.5, 3, 1.0, 6), which is a
discrete random variable. What is the random variable's expected value?.
Answer: (0.3)(1) + (0.5-0.3)(3) + (1.0 - 0.5)(6) = 3.9
◍ MLE (maximum likelihood).
Answer: The set of parameters that minimizes the sum of squared errors
◍ Autoregression.
Answer: Predicting the current value based on previous time periods' values
, ◍ Unsupervised learning.
Answer: Correct answer (response) is not known (Ex: Clustering)
◍ High p-value.
Answer: Data is more compatible with the null hypothesis
◍ Real effect.
Answer: Real relationship between attributes and response, same in all data
sets
◍ Spline.
Answer: Function of polynomials that connect to each other
◍ Memoryless Property.
Answer: It doesn't matter what's happened in the past. All that matters is
where we are now.
◍ Censored Data.
Answer: No data before or after a specific time or no data after a certain
number of observed occurrences
◍ R-squared.
Answer: Estimate of how much variability the model accounts for
◍ Failure spreadsheet.
Answer: - You can cause resource failures by scheduling "breakdown"
demons" (fake customers with high priority)- Better way is to use the
Resource and Failure spreadsheets in conjunction with each other-Can
schedule multiple failures by using multiple rows of the Failure column in
the Resource spreadsheet.
◍ Validation.
Answer: Measuring the quality of a model
◍ Heuristic.
Answer: Fast, good but not guaranteed to find absolute best solution
◍ True or False? For easy display and organizational purposes, our Call Center
2026 QUESTIONS WITH SOLUTIONS
GRADED A+
◍ Factorial Design.
Answer: Determine effects of factors.
◍ Optimal solution.
Answer: Feasible solution with the best objective value (output of an
optimization model)
◍ T-Statistic.
Answer: The coefficient divided by its standard error
◍ Which block is NOT in the Blocks template?.
Answer: Process Block- No such thing, but the Process module is in the
Basic Process panelBlocks template:- Seize block- Delay block- Release
block- Alter block- Queue block
◍ Which module/spreadsheet is NOT in the Advanced Process panel?.
Answer: Process Model - The process model is in the Basic Process
panel.Advanced Process Panel-Seize module-Delay module-Release
module-Expression spreadsheets-Failure spreadsheets
◍ Consider the Arena expression DISC(0.3, 1, 0.5, 3, 1.0, 6), which is a
discrete random variable. What is the random variable's expected value?.
Answer: (0.3)(1) + (0.5-0.3)(3) + (1.0 - 0.5)(6) = 3.9
◍ MLE (maximum likelihood).
Answer: The set of parameters that minimizes the sum of squared errors
◍ Autoregression.
Answer: Predicting the current value based on previous time periods' values
, ◍ Unsupervised learning.
Answer: Correct answer (response) is not known (Ex: Clustering)
◍ High p-value.
Answer: Data is more compatible with the null hypothesis
◍ Real effect.
Answer: Real relationship between attributes and response, same in all data
sets
◍ Spline.
Answer: Function of polynomials that connect to each other
◍ Memoryless Property.
Answer: It doesn't matter what's happened in the past. All that matters is
where we are now.
◍ Censored Data.
Answer: No data before or after a specific time or no data after a certain
number of observed occurrences
◍ R-squared.
Answer: Estimate of how much variability the model accounts for
◍ Failure spreadsheet.
Answer: - You can cause resource failures by scheduling "breakdown"
demons" (fake customers with high priority)- Better way is to use the
Resource and Failure spreadsheets in conjunction with each other-Can
schedule multiple failures by using multiple rows of the Failure column in
the Resource spreadsheet.
◍ Validation.
Answer: Measuring the quality of a model
◍ Heuristic.
Answer: Fast, good but not guaranteed to find absolute best solution
◍ True or False? For easy display and organizational purposes, our Call Center
