ISYE 6501 Midterm Exam Questions With Correct Answers

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