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ISYE 6644 FINAL EXAM SIMULATION EXAM
NEWEST 2025/2026 COMPLETE QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+||BRAND NEW VERSION!!
If f(x, y) = cxy for all 0 < x < 1 and 1 < y < 2, where c is whatever value makes
this thing integrate to 1, then X and Y are independent random variables
......answer.....TRUE. (Because f(x, y) = a(x)b(y) factors nicely, and there are
no funny limits.)
In our Arena Call Center example, it was possible for entities to be left in the
system when it shut down at 7:00 p.m. (even though we stopped allowing
customers to enter the system at 6:00 p.m.). ......answer.....TRUE — because
of the small chance that a callback will occur.
An entity can be scheduled to visit the same resource twice, with different
service time distributions on the two visits! ......answer.....TRUE
Arena has a built-in Input Analyzer tool that allows for the fitting of certain
distributions to data. ......answer.....TRUE
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The Kolmogorov-Smirnov test can be used both to see (i) if data seem to fit
to a particular hypothesized distribution and (ii) if the data are independent.
......answer.....FALSE. (It's just a goodness-of-fit test.)
Welch's method is a graphical technique to estimate truncation
(initialization bias) points for steady-state simulation. ......answer.....TRUE
If you are using a ranking-and-selection procedure and two competitors
happen to fall within the indifference-zone, then you don't really care too
much which one you end up selecting. ......answer.....TRUE. That's why it's
called the IZ!
TRUE or FALSE? Sequential ranking-and-selection procedures are designed
to stop early if one alternative seems to be way out in front of the others.
......answer.....TRUE
Suppose, when designing a ranking-and-selection procedure, you have
decided to increase the desired probability of correct selection compared to
a previous run of the procedure. What can you expect? (a) Sample sizes that
are about the same
(b) Larger sample sizes
(c) Somewhat lower achieved Pr(CS)
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(d) A larger indifference zone
(e) Lower confidence in your selection ......answer.....b
In Arena, you can use a single DECIDE module to route customers to that
one of four servers having the smallest queue. ......answer.....TRUE
TRUE or FALSE? In Arena, you can use the expression EXPO(3) to generate
exponential interarrival times having a mean of 1/3. ......answer.....FALSE. The
mean of an EXPO(3) is 3.
TRUE or FALSE? In Arena, an alternative expression to generate exponential
interarrival times having a mean of 1/3 is -(1/3)*LN(UNIF(0,1))
......answer.....TRUE. This is the Inverse Transform Method to generate
an observation coming from Exp(λ = 3).
TRUE or FALSE? In Arena, it is possible to set the maximum capacity of a
queue from within a SEIZE module. ......answer.....FALSE. It is only possible
to set a maximum queue capacity from within a QUEUE block found in the
Blocks template. 2
TRUE or FALSE? In Arena, the expression NORM(-1,2)+NORM(3,2) has the
same distribution as the expression NORM(2,4) ......answer.....FALSE. The
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above expression evaluates to NORM(2,√ 8) since, in Arena,
NORM(x,2) corresponds to a normal random variate with a mean of x
and a standard deviation of 2; so the variance of this random variable
is 22 = 4.
TRUE or FALSE? In Arena, it is only possible to use one resource at a time in
a PROCESS module. ......answer.....FALSE
TRUE or FALSE? In Arena, once an entity is defined, it is not possible to
change the priority in which it gets processed by a resource.
......answer.....FALSE
TRUE or FALSE? In Arena, it is not possible to use a single RELEASE module
to release multiple different resources ......answer.....FALSE. We observed this
in the ReleaseHospitalRoomLater demo in HW7
What is the distribution given by the Arena expression UNIF(1,2)+UNIF(1,2)?
......answer.....Tria(2,3,4).
An Arena ASSIGN module can be used to assign values to attributes and
variables ......answer.....TRUE
ISYE 6644 FINAL EXAM SIMULATION EXAM
NEWEST 2025/2026 COMPLETE QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+||BRAND NEW VERSION!!
If f(x, y) = cxy for all 0 < x < 1 and 1 < y < 2, where c is whatever value makes
this thing integrate to 1, then X and Y are independent random variables
......answer.....TRUE. (Because f(x, y) = a(x)b(y) factors nicely, and there are
no funny limits.)
In our Arena Call Center example, it was possible for entities to be left in the
system when it shut down at 7:00 p.m. (even though we stopped allowing
customers to enter the system at 6:00 p.m.). ......answer.....TRUE — because
of the small chance that a callback will occur.
An entity can be scheduled to visit the same resource twice, with different
service time distributions on the two visits! ......answer.....TRUE
Arena has a built-in Input Analyzer tool that allows for the fitting of certain
distributions to data. ......answer.....TRUE
,2|Page
The Kolmogorov-Smirnov test can be used both to see (i) if data seem to fit
to a particular hypothesized distribution and (ii) if the data are independent.
......answer.....FALSE. (It's just a goodness-of-fit test.)
Welch's method is a graphical technique to estimate truncation
(initialization bias) points for steady-state simulation. ......answer.....TRUE
If you are using a ranking-and-selection procedure and two competitors
happen to fall within the indifference-zone, then you don't really care too
much which one you end up selecting. ......answer.....TRUE. That's why it's
called the IZ!
TRUE or FALSE? Sequential ranking-and-selection procedures are designed
to stop early if one alternative seems to be way out in front of the others.
......answer.....TRUE
Suppose, when designing a ranking-and-selection procedure, you have
decided to increase the desired probability of correct selection compared to
a previous run of the procedure. What can you expect? (a) Sample sizes that
are about the same
(b) Larger sample sizes
(c) Somewhat lower achieved Pr(CS)
,3|Page
(d) A larger indifference zone
(e) Lower confidence in your selection ......answer.....b
In Arena, you can use a single DECIDE module to route customers to that
one of four servers having the smallest queue. ......answer.....TRUE
TRUE or FALSE? In Arena, you can use the expression EXPO(3) to generate
exponential interarrival times having a mean of 1/3. ......answer.....FALSE. The
mean of an EXPO(3) is 3.
TRUE or FALSE? In Arena, an alternative expression to generate exponential
interarrival times having a mean of 1/3 is -(1/3)*LN(UNIF(0,1))
......answer.....TRUE. This is the Inverse Transform Method to generate
an observation coming from Exp(λ = 3).
TRUE or FALSE? In Arena, it is possible to set the maximum capacity of a
queue from within a SEIZE module. ......answer.....FALSE. It is only possible
to set a maximum queue capacity from within a QUEUE block found in the
Blocks template. 2
TRUE or FALSE? In Arena, the expression NORM(-1,2)+NORM(3,2) has the
same distribution as the expression NORM(2,4) ......answer.....FALSE. The
, 4|Page
above expression evaluates to NORM(2,√ 8) since, in Arena,
NORM(x,2) corresponds to a normal random variate with a mean of x
and a standard deviation of 2; so the variance of this random variable
is 22 = 4.
TRUE or FALSE? In Arena, it is only possible to use one resource at a time in
a PROCESS module. ......answer.....FALSE
TRUE or FALSE? In Arena, once an entity is defined, it is not possible to
change the priority in which it gets processed by a resource.
......answer.....FALSE
TRUE or FALSE? In Arena, it is not possible to use a single RELEASE module
to release multiple different resources ......answer.....FALSE. We observed this
in the ReleaseHospitalRoomLater demo in HW7
What is the distribution given by the Arena expression UNIF(1,2)+UNIF(1,2)?
......answer.....Tria(2,3,4).
An Arena ASSIGN module can be used to assign values to attributes and
variables ......answer.....TRUE
