Compare and contrast the Engle–Granger and Johansen methodologies for testing for cointegration and modelling cointegrated systems. Which represents the superior approach and why?
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Compare and contrast the Engle–Granger and Johansen methodologies for testing for cointegration and modelling cointegrated systems. Which represents the superior approach and why?
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- Discuss how one might test for cointegration between variables using the Engle-Granger (EG) 2-step approach and discuss the drawbacks of EG’s approach.We now review the topic of model validation: (a) Explain how validation set approach is implemented. What are its main disadvantages?(b) Explain how the leave-one-out cross-validation is implemented (LOOCV). Howdoes it improve on validation set approach?(c) What is the main disadvantage of LOOCV approach? Hint: Imagine we have10000 observations and 20 variables.(d) Could we use validation set & LOOCV for any supervised learning approach?Or only for KNN? Please read the question and answer througly in complete sentences into words.Create the appropriate fully labeled Crow’s Foot ERD. State your assumptions clearly Create the appropriate fully labeled Chen ERD. State your assumptions clearly Identify all of the main entities and identify the primary key and attributes Identify all of the relations and connectivities among entities. Resolve all M:N relationships A trucking company called TRUCKERS is responsible for picking up shipments for warehouses of a retail chain called MAZE BROTHERS and delivering the shipments to individual retail store locations of MAZE BROTHERS. Currently, there are six warehouse locations and 45 retail stores of MAZE BROTHERS. A truck may carry several shipments during a single trip, which is identified by a Trip#, and delivers those shipments to multiple stores. Each shipment is identified by a Shipment# and includes data on shipment volume, weight, destination, etc. Trucks have different capacities for both the volumes they can hold and the weights they can…
- How would you go about calculating the likelihood of a "super-event" or a "unique event?" What variables would you take into account ?What are the advanatges and limitations of using each Quantitaive Risk Assessments such as Bayesian Network, Fault Tree Analysis, Event Tree Analysis and Bow Tie Analysis in the oil refinery storage industry?Tucson Machinery, Inc., manufactures numerically controlled machines, which sell for an average price of $14.0 million each. Sales for these NCMs for the past two years were as follows: Use Exhibit 3.10. QUARTER LAST YEAR I II III IV QUANTITY (UNITS) Y = 14 20 28 18 QUARTER THIS YEAR I II III IV QUANTITY (UNITS) 20 26 30 15 a. Find the equation of a simple linear regression line using Excel. (Round your answers to 3 decimal places.) > Answer is complete but not entirely correct. 18.535 X + 0.630 t
- Professor Ahmad of Oasis University gave an engineering case study to his class to analyze and comment. It is a famous case that many universities use in engineering education. Omar, who is a student of Professor Ahmad's class found a website that contains analysis done by many students of Western University. Omar told his close friends Jameel and Khalid what he found. They selected three different analyses. That means each one got a well- written and ready-made answer. Omar directly copied from what he selected. He did not even indicate the website as a source of reference in his submission. Jameel did not directly copy from the one he selected. He rephrased some of the sentences. He also indicated the website as a source of reference in his submission. Although Khalid studied the sample he selected and some others samples available on that website, he wrote the analysis on his own. He also indicated the website as a source of reference. Professor Ahmad's action is academically Select…Explain the following type of testing the reliability of an instrument: Internal consistency reliability Test retest Inter rater reliability Cronbach alpha efficientThe Colonel Car Company has experienced a significant number of warranty claimsassociated with the driver’s side mirror in its luxury car. Almost 10% of the warrantyclaims in the first 6 months of operation relate to this mirror. The design engineers atColonel have come up with a new design for the driver’s side mirrors. They believe thenew design will not only reduce the warranty claims but also cut production costs. Thedecision is complicated by two factors. (1) Production of next year’s model is to begin inexactly 6 months, which means there is insufficient time to carry out a comprehensive productionrun test of the new design. (2) This model year has been classified as a quiet yearto discourage design changes. Colonel executives have to decide whether or not to pursuethe design change of the mirrors.The design change is expected to eliminate a major problem with a key component ofthe mirror, which accounted for 60% of the $250,000 in mirror warranty claims. Theanticipated reduction…
- Which is larger, Ws or Wq? Explain.An entrepreneur has embarked on a project to use human hair in place of animal furs in a clothing line. The human hair is to be woven into cotton fabrics, to make a hybrid fabric, that can be used as a thermal insulating fabric (i.e., it keeps persons warm). To increase the probability of sales the hybrid fabric must be dyed in various colors. Provide advice to the entrepreneur on what approaches should/could be taken to dye the new hybrid fabric. In your advice discuss the requirements of the dyes to be used, why hair dyes would not be a good option and how the dye(s) you suggest would work in the application based on the structure/properties of the fabric.Australia's consumer watch dog has sued Samsung Electronics for allegedly misleading consumers by promoting water-resistant Galaxy smart phones as suitable to use in swimming pools. 1) What model choice clarifies this problem? 1b. What technology choice is appropriate for the design?