STAT 758: Homework #6 Due on Wednesday‚ 11 April‚ 2012 Zaliapin‚ 1:00pm Tracy Backes 1 Tracy Backes STAT 758 (Zaliapin): HW #6 Problem #1 We assume below that Zt ∼ W N (0‚ σ 2 )‚ B is a backshift operator. 6.1 For the model (1 − B)(1 − 0.2B)Xt = (1 − 0.5B)Zt : a) Classify the model as an ARIMA(p‚ d‚ q) process (i.e. find p‚ d‚ q). ARIMA(1‚1‚1) b) Determine whether the process is stationary‚ causal‚ invertible. • The process is stationary if all roots of ϕ(z) are off of the unit
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much “leverage” the firm has in its capital structure. The basic trade-off a company makes in determining the “right” ratio (i.e.‚ capital structure) is between the risks inherent in taking on fixed debt obligations versus the opportunity to increase the shareholders’ profitability by having some debt in the capital structure. (A more detailed study of capital structure decisions is covered in finance courses.) Problema 8-2 Morei a. Basic earnings per share = McGraw-Hill ($19‚550‚000 − $3‚900
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areas to urban areas‚ a process known as urbanisation. The scale of this can be shown through the way that the population of those living in urban areas overtook that of those living in rural areas in 2011. As the population of a place increases problems such as overpopulation and traffic congestion will occur. Generally however‚ the issues facing MICs and LICs will differ from those in HICs. For example in MICs there are schemes such as Indonesia’s Transmigration scheme or China’s One Child Policy
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Introduction to Linear Programming Steven J. Miller∗ March 31‚ 2007 Mathematics Department Brown University 151 Thayer Street Providence‚ RI 02912 Abstract We describe Linear Programming‚ an important generalization of Linear Algebra. Linear Programming is used to successfully model numerous real world situations‚ ranging from scheduling airline routes to shipping oil from refineries to cities to finding inexpensive diets capable of meeting the minimum daily requirements. In many of these problems‚ the number
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School security is a current problem people are trying to strengthen and advance. They are trying to make schools a safe place for kids so parents do not have to worry about the safety of their child when they are at school. Recently a man worked his way into a school in Connecticut and shot students and teachers. This shows that even though people are trying to strengthen school security‚ there are still weaknesses that need to be fixed so something like this does not happen again. Somehow this
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Duality in Linear Programming 4 In the preceding chapter on sensitivity analysis‚ we saw that the shadow-price interpretation of the optimal simplex multipliers is a very useful concept. First‚ these shadow prices give us directly the marginal worth of an additional unit of any of the resources. Second‚ when an activity is ‘‘priced out’’ using these shadow prices‚ the opportunity cost of allocating resources to that activity relative to other activities is determined. Duality in linear programming
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Zara: The Technology Giant of the Fashion World Synopsis Zara is a company that defines what the fashion industry has termed “fast fashion.” The flagship specialty chain of Spain-based clothing conglomerate‚ Inditex‚ Zara has built an information and distribution system that allows it to put the latest runway fashions in its stores in a matter of weeks at a fraction of what the big-name designers charge. In addition to fast‚ Zara is prolific. In a typical year‚ Zara launches about 11‚000
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Aib Homework Wk3 Problem 1 The following data were obtained from a project to create a new portable electronic. Activity Duration Predecessors A 5 Days --- B 6 Days --- C 8 Days --- D 4 Days A‚ B E 3 Days C F 5 Days D G 5 Days E‚ F H 9 Days D I 12 Days G Step 1: Construct a network diagram for the project. Step 2: Answer the following questions: (15 points total) a) What is the Scheduled Completion of the Project? (2 points) 32 -> CORRECT b) What is the Critical Path of the Project
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Among the various socioeconomic problems‚ which our country is facing today‚ the problem of unemployment is one of the most serious Unemployment is defined as condition of a person who is willing to work but unable to find a paying job. There are various factors that are responsible for unemployment i country. Unemployment can be due to seasonal layoff particularly in agricultural sector. It can be due to technological changes in an automated industry or due to lack of adequate skills by the workers
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Solutions Software Company is a leading international software company. It is Australian division which is located in Sydney. Jane Cordon is new General Manger in Solutions Software Company. However‚ due to strange work environment and new work requirements‚ there exist many problems in Solutions Software Company. These problems include leadership skill problems‚ conflict of communication or inappropriate leadership style. If some problems don’t gain effective solutions‚ conflict between leaders
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