12. In 2010 consumption (Ci) for selected countries was as follows Jordan 2.5 billion $, USA 100 billion $, Canada 50 billion $, France 40 billion $ Qatar 10 billion $. and Russia 70 billion $. for the same year income (Yi) was: Jordan 12 billion $, USA 900 billion $, Canada 700 billion $, France 500 billion $ Qatar 60 billion $.and Russia 100 billion $. if we want to estimate the following model Ci=B1+B2YI+Ui calculate Var(b2)? * Enter your answer

12. In 2010 consumption (Ci) for selected countries was as follows Jordan 2.5 billion $, USA 100 billion $, Canada 50 billion $, France 40 billion $ Qatar 10 billion $. and Russia 70 billion $. for the same year income (Yi) was: Jordan 12 billion $, USA 900 billion $, Canada 700 billion $, France 500 billion $ Qatar 60 billion $.and Russia 100 billion $. if we want to estimate the following model Ci=B1+B2YI+Ui calculate Var(b2)? * Enter your answer

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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13. answer the question in the picture!
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Table 1. The manager of Carpet City outlet store needs to be able to forecast accurately demand for Soft Shang carpet. Demand for the past 20 weeks appears in table 1 below. week Demand Forecast Error ABS. Dev Squared Error APE 1 20 2 28 3 22 4 18 5 22 6 22 7 22 8 26 9 23 10 23 11 23 12 27 13 25 14 22 15 23 16 14 17 14 18 15 19 11 20 16 21 22 23 24…
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13. In 2010 consumption (Ci) for selected countries was as follows Jordan 2.5 billion $, USA 100 billion $, Canada 50 billion $, France 40 billion $ Qatar 10 billion $. and Russia 70 billion $.for the same year income (Yi) was: Jordan 12 billion $, USA 900 billion $, Canada 700 billion $, France 500 billion $ Qatar 60 billion $. and Russia 100 billion $.if we want to estimate the following model Ci=B1+B2YI+Ui calculates the intercept? The value must be a number
6. The annual population of Afghanistan is available in the global economy data set. a. Plot the data and comment on its features. Can you observe the effect of the Soviet- Afghan war? b. Fit a linear trend model and compare this to a piecewise linear trend model with knots at 1980 and 1989. c. Generate forecasts from these two models for the five years after the end of the data, and comment on the results.
8. In 2010 consumption (Ci) for selected countries was as follows Jordan 2.5 billion $, USA 100 billion $, Canada 50 billion $, France 40 billion $ Qatar 10 billion $. and Russia 70 billion $. for the same year income (Yi) was: Jordan 12 billion $, USA 900 billion $, Canada 700 billion $, France 500 billion $ Qatar 60 billion $.and Russia 100 billion $. if we want to estimate the following model Ci=B1+B2YI+Ui calculate * EC =???? Enter your math answer
An automobile manufacturer is considering mechanical design changes in one of its top-selling cars to reduce the weight of the car by at least 420 pounds to improve its fuel efficiency. Design engineers have identified 10 changes that could be made in the car to make it lighter (e.g., using composite body pieces rather than metal). The weight saved by each design change and the estimated costs of implementing each change are summarized in the following table. Design Change 1 2 3 4 6 7 8 10 Weight Saved (Ibs) 50 75 25 150 60 95 200 40 80 30 Cost (in $1,000s) 150 350 50 650 90 35 450 75 110 30 Changes 4 and 7 represent alternate ways of modifying the engine block and, therefore, only one of these options could be selected. The company wants to determine which changes to make in order to reduce the total weight of the car by at least 420 pounds in the least costly manner. (a) Formulate an ILP model for this problem to minimize cost (in thousands of dollars). (Let X, = 1 if design change i…
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An entrepreneur who owns and operates two businesses (A and B) would like to analyze their profitability. They would like your help in the analysis. They give you the annual net profit (in thousands of $) for each business from 2008-2020. Table 1: Annual Net Profits for Businesses A and B Business Year Profit Business Year Profit 2008 -50 2008 -10 2009 57 2009 30 2010 71 2010 27 2011 64 2011 22 2012 60 2012 21 2013 50 2013 20 A 2014 41 2014 24 2015 59 2015 24 2016 71 2016 32 2017 71 2017 36 2018 74 2018 37 019 81 20 40 2020 97 2020 49 a. Suppose you want to graph the distribution of profits. Explain why using only one stem- plot might not be optimal for the analysis. b. Describe the correct stemplot to use. Generate this stemplot. Explain your steps. What can you say about the distribution from this stemplot? c. When are stemplots useful? And why is that? d. Suppose that instead of having 26 observations you have 200 observations. What graph should you generate? e. What other type of…