ISYE 6501 MIDTERM EXAM GRADED A+ LATEST

ISYE 6501 MIDTERM EXAM GRADED A+ LATEST 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 ANSWERUp How do you make errors more costly in a soft SVM classifier? -CORRECT ANSWERinclude 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 ANSWERScaling 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 ANSWERcontextual 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. What is the initial condition for T in exponential smoothing with trending? -CORRECT ANSWER-T_i=0 In cyclic exponential smoothing, L represents..., -CORRECT ANSWER-The length of the cycle or season In cyclic exponential smoothing, C_1 ... C_L = ___?, -CORRECT ANSWER-1. In other words, initialize it to no initial cycle. Exponential, trending and cyclic smoothing are also referred to as -CORRECT ANSWER-single double and triple. Triple smoothing is also known as? -CORRECT ANSWER-Winter's or Holt-Winter's What is the optimization formula for Exponential Smoothing? -CORRECT ANSWERmin(F_t-Xt)^2 where alpha and beta are between 0 and 1. ARIMA stands for? -CORRECT ANSWER-Autoregressive Integrated Moving Average Exponential smoothing is an order ___ autoregressive model. -CORRECT ANSWERInfinity. It uses data going all the way back.