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ISYE 6501 Midterm Questions and Answers.
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ISYE 6501 MidtermQuestions and Answers
Denning [Date] [Course title]
,What does SVM stand for? - Correct Answers:s :Support Vector Machine
Is written text structured or unstructured? - Correct Answers:s :Unstructured
When we increase the sum of the square of the coefficients we... - Correct Answers:s :Decrease the
distance between the lines
In SVM soft classifier we tradeoff between maximizing ___ and minimizing ___ - Correct
Answers:s :margin and errors
If lambda gets small what gets emphasized, large margin or minimizing training error?, - Correct
Answers:s :Minimizing errors.
What is a support vector? - Correct Answers:s :A point that holds up a shape.
Does ...[⅔(a-1)+1/3(a+1)] move an SVM classifier up or down? - Correct Answers:s :Up
How do you make errors more costly in a soft SVM classifier? - Correct Answers:s :include a multiplier
for the point-error term.
If an SVM coefficient is very close to zero... - Correct Answers:s :that term is not very important to the
classification.
What is the difference between standardization and scaling? - Correct Answers:s :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:s :Euclidean distance
What is the 1-norm? - Correct Answers:s :The rectilinear (Manhattan) distance
, What is the infinity norm? - Correct Answers:s :The value of the largest dimension
Measuring the quality of a model is called? - Correct Answers:s :Validation
What does a confusion matrix show? - Correct Answers:s :The performance of a classification model.
A time series outlier that seems "off the curve" is called a... - Correct Answers:s :contextual outlier.
A data element that is different from all other data in a set is called a... - Correct Answers:s :point
outlier.
When something is missing in a range of points - Correct Answers:s :it is called a..., collective outlier.
The whiskers on a box plot extend to... - Correct Answers:s :the 10th and 90th percentiles (or 5th and
95th)
Why are hypothesis tests generally not sufficient for change detection? - Correct Answers:s :They are
slow to detect changes.
In CUSUM, T is _____ and C is _____., - Correct Answers:s :Threshold and a "bring down factor"
In a CUSUM model, you adjust T and C to manage the tradeoff between..., - Correct Answers:s :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:s :Close to 1.
What is the initial condition for T in exponential smoothing with trending? - Correct Answers:s :T_i=0
In cyclic exponential smoothing, L represents..., - Correct Answers:s :The length of the cycle or season
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