1|Page
ISYE 6644 MIDTERM SIMULATION EXAM NEWEST 2026/2027
COMPLETE QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+||JUST OUT!!!
Let's take a bunch of independent observations from a "well-
behaved" distribution. The Central Limit Theorem says that the
standardized sample mean of those observations converges to
what distribution? - ANSWER-Normal
What are three things that help define what a statistic is? -
ANSWER-1) a statistic is a function of the observations X1
through Xn and not dependent on any unknowns. So basically
something like the mean, cause you know all the parameters
2) statistics are random variables
3) a statistic is usually used to estimate some unknown
parameter from the underlying probability distribution of the
X's
What is unbiasedness? - ANSWER-the expected value of Xbar
(the sample mean) equals the actual mean (mu)
,2|Page
TRUE or FALSE? The sample mean is always unbiased for the
true mean. And, while we're at it, the sample variance is always
unbiased for the true variance. - ANSWER-True
Suppose that we are using some estimator 𝑇 to estimate an
unknown parameter 𝜃. Further suppose that 𝑇 has a bias of 3
and a variance of 5. What is 𝑇's mean squared error? -
ANSWER-MSE = 𝖡𝗂𝖺𝗌2 + Variance = 14.
TRUE or FALSE? The length of a confidence interval increases as
you demand higher confidence (larger 1 - ∞). - ANSWER-True
TRUE or FALSE? A 95% confidence interval means that you are
95% sure that the true parameter lies somewhere in the
interior of the interval. - ANSWER-True
Which step is 𝑛𝑜𝑡 essential for a successful simulation study?
A). Problem formulation
B). Model validation
C) experimental design
D) output analysis
, 3|Page
E) attendance at the university of georgia - ANSWER-E)
attendance at the university of georgia
What is an entity in a simulation? - ANSWER-Entities can be
permanent (like a machine), or temporary like customers, and
can have various properties or attributes (priority of a customer
or averaged speed of a server).
What is a system? - ANSWER-A system is a collection of entities
that interact together to accomplish a goal.
What is a model? - ANSWER-A model is an abstract
representation of a system.
What is the system state? - ANSWER-A set of variables that
contains enough information to describe the system. Think of
the state as a snapshot of the system?
ex knowing how many people are in the queue and if the server
is busy for a single server queue model
ISYE 6644 MIDTERM SIMULATION EXAM NEWEST 2026/2027
COMPLETE QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+||JUST OUT!!!
Let's take a bunch of independent observations from a "well-
behaved" distribution. The Central Limit Theorem says that the
standardized sample mean of those observations converges to
what distribution? - ANSWER-Normal
What are three things that help define what a statistic is? -
ANSWER-1) a statistic is a function of the observations X1
through Xn and not dependent on any unknowns. So basically
something like the mean, cause you know all the parameters
2) statistics are random variables
3) a statistic is usually used to estimate some unknown
parameter from the underlying probability distribution of the
X's
What is unbiasedness? - ANSWER-the expected value of Xbar
(the sample mean) equals the actual mean (mu)
,2|Page
TRUE or FALSE? The sample mean is always unbiased for the
true mean. And, while we're at it, the sample variance is always
unbiased for the true variance. - ANSWER-True
Suppose that we are using some estimator 𝑇 to estimate an
unknown parameter 𝜃. Further suppose that 𝑇 has a bias of 3
and a variance of 5. What is 𝑇's mean squared error? -
ANSWER-MSE = 𝖡𝗂𝖺𝗌2 + Variance = 14.
TRUE or FALSE? The length of a confidence interval increases as
you demand higher confidence (larger 1 - ∞). - ANSWER-True
TRUE or FALSE? A 95% confidence interval means that you are
95% sure that the true parameter lies somewhere in the
interior of the interval. - ANSWER-True
Which step is 𝑛𝑜𝑡 essential for a successful simulation study?
A). Problem formulation
B). Model validation
C) experimental design
D) output analysis
, 3|Page
E) attendance at the university of georgia - ANSWER-E)
attendance at the university of georgia
What is an entity in a simulation? - ANSWER-Entities can be
permanent (like a machine), or temporary like customers, and
can have various properties or attributes (priority of a customer
or averaged speed of a server).
What is a system? - ANSWER-A system is a collection of entities
that interact together to accomplish a goal.
What is a model? - ANSWER-A model is an abstract
representation of a system.
What is the system state? - ANSWER-A set of variables that
contains enough information to describe the system. Think of
the state as a snapshot of the system?
ex knowing how many people are in the queue and if the server
is busy for a single server queue model
