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