Midterm Quiz 1 - Audit Learners 90 Minute Time Limit, Questions and answers, Graded A+

Document Content and Description Below

Midterm Quiz 1 - Audit Learners 90 Minute Time Limit Instructions Work alone. Do not collaborate with or copy from anyone else. You may use any of the following resources: One sheet (both sides) ... of handwritten (not photocopied or scanned) notes If any question seems ambiguous, use the most reasonable interpretation (i.e. don't be like Calvin):   5/28/2019 Midterm Quiz 1 - Audit Learners | Midterm Quiz 1 - Audit Learners | ISYE6501x Courseware | edX https://courses.edx.org/courses/course-v1:GTx+ISYE6501x+1T2019/courseware/a8e7783f3b6d4b21bbf5720bb6f02a92/7244922e3d3a401994e816be1741097c/1?activate_block_id=block-v1%3AGTx%2BISYE6501x%2… 2/31 Good Luck! Question 1 13 points possible (graded)  Keyboard Help Drag each model to a type of question it is commonly used for. For models that have more than one correct answer, choose any one correct answer; for models that have no correct answer listed, do not drag them. ARIMA CART Cross validation CUSUM Exponential smoothing GARCH k-means k-nearest-neighbor Linear regression Logistic regression Principal component analysis5/28/2019 Midterm Quiz 1 - Audit Learners | Midterm Quiz 1 - Audit Learners | ISYE6501x Courseware | edX https://courses.edx.org/courses/course-v1:GTx+ISYE6501x+1T2019/courseware/a8e7783f3b6d4b21bbf5720bb6f02a92/7244922e3d3a401994e816be1741097c/1?activate_block_id=block-v1%3AGTx%2BISYE6501x%2… 3/31 Submit You have used 0 of 1 attempts. Random forest Support vector machine5/28/2019 Midterm Quiz 1 - Audit Learners | Midterm Quiz 1 - Audit Learners | ISYE6501x Courseware | edX https://courses.edx.org/courses/course-v1:GTx+ISYE6501x+1T2019/courseware/a8e7783f3b6d4b21bbf5720bb6f02a92/7244922e3d3a401994e816be1741097c/1?activate_block_id=block-v1%3AGTx%2BISYE6501x%2… 4/31 Question 2 0.0/3.0 points (graded) Select all of the following models that are designed for use with time series data: You have used 0 of 1 attempt FEEDBACK  Drag the items onto the image above.  Reset  Show Answer ARIMA  CUSUM  Exponential Smoothing  GARCH  k-nearest-neighbor Submit5/28/2019 Midterm Quiz 1 - Audit Learners | Midterm Quiz 1 - Audit Learners | ISYE6501x Courseware | edX https://courses.edx.org/courses/course-v1:GTx+ISYE6501x+1T2019/courseware/a8e7783f3b6d4b21bbf5720bb6f02a92/7244922e3d3a401994e816be1741097c/1?activate_block_id=block-v1%3AGTx%2BISYE6501x%2… 5/31 Answers are displayed within the problem INFORMATION FOR QUESTIONS 3A, 3C FIGURES A AND B SHOW THE TRAINING DATA FOR A CLASSIFICATION PROBLEM, USING TWO PREDICTORS (X AND X ) TO SEPARATE BETWEEN BLACK AND WHITE POINTS. THE DASHED LINES ARE THE CLASSIFIERS. Figure A Figure B Question 3a 0.0/3.0 points (graded) Figure B shows an SVM classiÕcation using a complex nonlinear kernel. (To get this perfect Õt to the training data, it required  1 25/28/2019 Midterm Quiz 1 - Audit Learners | Midterm Quiz 1 - Audit Learners | ISYE6501x Courseware | edX https://courses.edx.org/courses/course-v1:GTx+ISYE6501x+1T2019/courseware/a8e7783f3b6d4b21bbf5720bb6f02a92/7244922e3d3a401994e816be1741097c/1?activate_block_id=block-v1%3AGTx%2BISYE6501x%2… 6/31 Answers are displayed within the problem g g p ( g p g , q Õtting 16 parameter values!) Which of the following is true? You have used 0 of 1 attempt INFORMATION FOR QUESTIONS 3B, 3C Figure B is a very good classiÕer, because it correctly classiÕes all of the training data. Figure B is a very good classiÕer, because the model’s complexity shows that it is a deep analysis. Figure B is a bad classiÕer to use, because it is overÕt. Figure B might or might not be a good classiÕer, because it is overÕt.  Submit 5/28/2019 Midterm Quiz 1 - Audit Learners | Midterm Quiz 1 - Audit Learners | ISYE6501x Courseware | edX https://courses.edx.org/courses/course-v1:GTx+ISYE6501x+1T2019/courseware/a8e7783f3b6d4b21bbf5720bb6f02a92/7244922e3d3a401994e816be1741097c/1?activate_block_id=block-v1%3AGTx%2BISYE6501x%2… 7/31 FIGURE C Question 3b 3 points possible (graded)  Keyboard Help PROBLEM Figure C shows a classiÕcation that was found by a classiÕcation tree model. Drag the components of the classiÕcation tree into their correct places so that your tree gives the same classiÕcation shown in Figure C.5/28/2019 Midterm Quiz 1 - Audit Learners | Midterm Quiz 1 - Audit Learners | ISYE6501x Courseware | edX https://courses.edx.org/courses/course-v1:GTx+ISYE6501x+1T2019/courseware/a8e7783f3b6d4b21bbf5720bb6f02a92/7244922e3d3a401994e816be1741097c/1?activate_block_id=block-v1%3AGTx%2BISYE6501x%2… 8/31 Question 3c FEEDBACK  Drag the items onto the image above. Submit You have used 0 of 1 attempts.  Reset  Show Answer5/28/2019 Midterm Quiz 1 - Audit Learners | Midterm Quiz 1 - Audit Learners | ISYE6501x Courseware | edX https://courses.edx.org/courses/course-v1:GTx+ISYE6501x+1T2019/courseware/a8e7783f3b6d4b21bbf5720bb6f02a92/7244922e3d3a401994e816be1741097c/1?activate_block_id=block-v1%3AGTx%2BISYE6501x%2… 9/31 Answers are displayed within the problem 0.0/4.0 points (graded) Select all of the following models that would classify the point (3,3) as white: You have used 0 of 1 attempt Question 3d 0.0/3.0 points (graded) Figure A Figure B  Figure C k-nearest-neighbor classiÕcation with k=7 Submit 5/28/2019 Midterm Quiz 1 - Audit Learners | Midterm Quiz 1 - Audit Learners | ISYE6501x Courseware | edX https://courses.edx.org/courses/course-v1:GTx+ISYE6501x+1T2019/courseware/a8e7783f3b6d4b21bbf5720bb6f02a92/7244922e3d3a401994e816be1741097c/1?activate_block_id=block-v1%3AGTx%2BISYE6501x%… 10/31 Answers are displayed within the problem In the soft classiÕcation SVM model where we select coeÞcients ... to minimize if we want to have a larger margin even though it means possibly having more classiÕcation error, the value of should get You have used 0 of 1 attempt INFORMATION FOR QUESTIONS 4A, 4B Seven diàerent regression models have been Õtted, using diàerent sets of variables. The Õgure below shows the resulting adjusted R-squared value for various models, as measured by cross-validation. w0 w‚ ∑ ‚w{0, 1 − ( + ) } + _ −1 ƒ ‚∑ ~=1 w~~ w0 Ž ∑ ~=1 ‚ w2 ~ _ Larger  Smaller It’s irrelevant Submit 5/28/2019 Midterm Quiz 1 - Audit Learners | Midterm Quiz 1 - Audit Learners | ISYE6501x Courseware | ed [Show More]

Last updated: 3 years ago

Preview 1 out of 31 pages