ISYE 6501 Midterm exam with |\ |\ |\ |\ |\
answers
What does SVM stand for? - CORRECT ANSWERS ✔✔Support
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Vector Machine |\
Is written text structured or unstructured? - CORRECT ANSWERS
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✔✔Unstructured
When we increase the sum of the square of the coefficients we... -
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CORRECT ANSWERS ✔✔Decrease the distance between the lines
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In SVM soft classifier we tradeoff between maximizing ___ and
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minimizing ___ - CORRECT ANSWERS ✔✔margin and errors
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If lambda gets small what gets emphasized, large margin or
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minimizing training error?, - CORRECT ANSWERS ✔✔Minimizing
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errors.
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What is a support vector? - CORRECT ANSWERS ✔✔A point that
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holds up a shape.
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,Does ...[⅔(a-1)+1/3(a+1)] move an SVM classifier up or down? -
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CORRECT ANSWERS ✔✔Up |\ |\
How do you make errors more costly in a soft SVM classifier? -
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CORRECT ANSWERS ✔✔include a multiplier for the point-error
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term.
If an SVM coefficient is very close to zero... - CORRECT ANSWERS
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✔✔that term is not very important to the classification.
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What is the difference between standardization and scaling? -
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CORRECT ANSWERS ✔✔Scaling is bounded in range.
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Standardization is scaling to a normal distribution. Standardization
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is the (value - factor mean) / (factor standard deviation)
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What is the 2-norm? - CORRECT ANSWERS ✔✔Euclidean distance
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What is the 1-norm? - CORRECT ANSWERS ✔✔The rectilinear
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(Manhattan) distance |\
What is the infinity norm? - CORRECT ANSWERS ✔✔The value of
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the largest dimension
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,Measuring the quality of a model is called? - CORRECT ANSWERS
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✔✔Validation
What does a confusion matrix show? - CORRECT ANSWERS
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✔✔The performance of a classification model.
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A time series outlier that seems "off the curve" is called a... -
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CORRECT ANSWERS ✔✔contextual outlier. |\ |\ |\
A data element that is different from all other data in a set is called
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a... - CORRECT ANSWERS ✔✔point outlier.
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When something is missing in a range of points - CORRECT
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ANSWERS ✔✔it is called a..., collective outlier. |\ |\ |\ |\ |\ |\
The whiskers on a box plot extend to... - CORRECT ANSWERS
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✔✔the 10th and 90th percentiles (or 5th and 95th)
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Why are hypothesis tests generally not sufficient for change
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detection? - CORRECT ANSWERS ✔✔They are slow to detect
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changes.
, In CUSUM, T is _____ and C is _____., - CORRECT ANSWERS
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✔✔Threshold and a "bring down factor" |\ |\ |\ |\ |\
In a CUSUM model, you adjust T and C to manage the tradeoff
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between..., - CORRECT ANSWERS ✔✔early detection and false-
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alarms
In exponential smoothing, if the data is less random, then you want
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to pick an alpha that is..., - CORRECT ANSWERS ✔✔Close to 1.
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What is the initial condition for T in exponential smoothing with
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trending? - CORRECT ANSWERS ✔✔T_i=0
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In cyclic exponential smoothing, L represents..., - CORRECT
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ANSWERS ✔✔The length of the cycle or season |\ |\ |\ |\ |\ |\ |\
In cyclic exponential smoothing, C_1 ... C_L = ___?, - CORRECT
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ANSWERS ✔✔1. In other words, initialize it to no initial cycle.
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Exponential, trending and cyclic smoothing are also referred to as -
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CORRECT ANSWERS ✔✔single double and triple.|\ |\ |\ |\ |\
answers
What does SVM stand for? - CORRECT ANSWERS ✔✔Support
|\ |\ |\ |\ |\ |\ |\ |\ |\
Vector Machine |\
Is written text structured or unstructured? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔Unstructured
When we increase the sum of the square of the coefficients we... -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔Decrease the distance between the lines
|\ |\ |\ |\ |\ |\ |\
In SVM soft classifier we tradeoff between maximizing ___ and
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
minimizing ___ - CORRECT ANSWERS ✔✔margin and errors
|\ |\ |\ |\ |\ |\ |\
If lambda gets small what gets emphasized, large margin or
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
minimizing training error?, - CORRECT ANSWERS ✔✔Minimizing
|\ |\ |\ |\ |\ |\
errors.
|\
What is a support vector? - CORRECT ANSWERS ✔✔A point that
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
holds up a shape.
|\ |\ |\
,Does ...[⅔(a-1)+1/3(a+1)] move an SVM classifier up or down? -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔Up |\ |\
How do you make errors more costly in a soft SVM classifier? -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔include a multiplier for the point-error
|\ |\ |\ |\ |\ |\ |\ |\
term.
If an SVM coefficient is very close to zero... - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔that term is not very important to the classification.
|\ |\ |\ |\ |\ |\ |\ |\
What is the difference between standardization and scaling? -
|\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔Scaling is bounded in range.
|\ |\ |\ |\ |\ |\ |\
Standardization is scaling to a normal distribution. Standardization
|\ |\ |\ |\ |\ |\ |\ |\
is the (value - factor mean) / (factor standard deviation)
|\ |\ |\ |\ |\ |\ |\ |\ |\
What is the 2-norm? - CORRECT ANSWERS ✔✔Euclidean distance
|\ |\ |\ |\ |\ |\ |\ |\
What is the 1-norm? - CORRECT ANSWERS ✔✔The rectilinear
|\ |\ |\ |\ |\ |\ |\ |\ |\
(Manhattan) distance |\
What is the infinity norm? - CORRECT ANSWERS ✔✔The value of
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
the largest dimension
|\ |\ |\
,Measuring the quality of a model is called? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔Validation
What does a confusion matrix show? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔The performance of a classification model.
|\ |\ |\ |\ |\
A time series outlier that seems "off the curve" is called a... -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔contextual outlier. |\ |\ |\
A data element that is different from all other data in a set is called
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
a... - CORRECT ANSWERS ✔✔point outlier.
|\ |\ |\ |\ |\
When something is missing in a range of points - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔it is called a..., collective outlier. |\ |\ |\ |\ |\ |\
The whiskers on a box plot extend to... - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔the 10th and 90th percentiles (or 5th and 95th)
|\ |\ |\ |\ |\ |\ |\ |\
Why are hypothesis tests generally not sufficient for change
|\ |\ |\ |\ |\ |\ |\ |\ |\
detection? - CORRECT ANSWERS ✔✔They are slow to detect
|\ |\ |\ |\ |\ |\ |\ |\ |\
changes.
, In CUSUM, T is _____ and C is _____., - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔Threshold and a "bring down factor" |\ |\ |\ |\ |\
In a CUSUM model, you adjust T and C to manage the tradeoff
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
between..., - CORRECT ANSWERS ✔✔early detection and false-
|\ |\ |\ |\ |\ |\ |\
alarms
In exponential smoothing, if the data is less random, then you want
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
to pick an alpha that is..., - CORRECT ANSWERS ✔✔Close to 1.
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
What is the initial condition for T in exponential smoothing with
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
trending? - CORRECT ANSWERS ✔✔T_i=0
|\ |\ |\ |\
In cyclic exponential smoothing, L represents..., - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔The length of the cycle or season |\ |\ |\ |\ |\ |\ |\
In cyclic exponential smoothing, C_1 ... C_L = ___?, - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔1. In other words, initialize it to no initial cycle.
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Exponential, trending and cyclic smoothing are also referred to as -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔single double and triple.|\ |\ |\ |\ |\
