CWRU Regression Project Report OPRE 433 Tianao Zhang 12/5/2011 Introduction According to the data I’ve received‚ there are 6578 observations. The data base is composed by 13 columns and 506 rows. All the explanatory variables are continuous as well as the dependent variable and there are no categorical variables. My goal is to build a regression model to predict the average of Y or particular Y by a given X. 1. Do the regression assumptions such as Constant Variance‚ Normality and Independence
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I met with Talon Peterson and administered 2 different reading test/tasks. First he completed a post test of the Renaissance Star test. This test is vocabulary and comprehension so the results are a fairly good indicator of overall reading ability. What Star won’t measure is fluency which is a major factor in determining a student’s ability to keep pace with their peers on reading and writing tasks. Results are reported in grade year and month. His scores were as follows: Baseline Testing:
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MgtOp 340 Homework Assignment 2 Problem 6.1 Continental Airlines (CA) is reluctant to begin service at the new Delayed Indefinitely Airport (DIA) until the automated baggage-handling system can transport luggage to the correct location with at least 99% reliability for any given flight. Lower reliability will result in damage to CA’s reputation for quality service. The baggage system will not deliver to the right location if any of its subsystems fail. The subsystems and their reliability
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Student Number: 7305-272-8 Due Date: 15 March 2011 [pic] a) Five-forces diagram for analysis of the retail car industry in the greater Johannesburg area 1. Competitive Rivalry Competitive rivalry exists between companies with the same or similar products/services and similar markets. Factors to be considered include: • The number and size of competitors • The rate of industry growth • Differentiation and switching costs • Fixed costs or perishable products • Expansion
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extent of competition in that industry. Along with these properties‚ the I/O Model for Above-Average Returns includes four underlying assumptions. The first is the pressure and constraints imposed by the external environment that decide what strategies are used to obtain above-average returns. The second is the resources used to aid in the implementation of this set of strategies are assumed to be mobile across the firm. Third‚ the firms competing within the industry control similar resources that
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Interpretation: * MODEL SUMMARY Model Summary | Model | R | R Square | Adjusted R Square | Std. Error of the Estimate | 1 | .549a | .301 | .292 | .59246 | a. Predictors: (Constant)‚ MEAN_OC | The first table of interest is the Model Summary table. This table provides the R and R2 value. * The R value is 0.549‚ which represents the simple correlation. * It indicates a average degree of correlation. The R2 value indicates how much of the dependent variable‚ "Job Satisfaction"‚ can be
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The evolving value chain of the car industry The automotive industry is one of the most progressive and forward-thinking industries. It confronts a number of trends that create new challenges while also providing opportunities for growth. One of the major trends is the demands of operating in a “connected” world. For more than 100 years the automotive industry has created competitive advantage mainly through engineering excellence. Moving forward‚ this will no longer be sufficient. Automotive manufacturers
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A registered nurse is trying to develop a diet plan for patients. The required nutritional elements are the total daily requirements of each nutritional element are as indicated in table 2: The nurse has four basic types to use when planning the menus. The units of nutritional elements per unit of food type are shown in the table below. Note than the cost associated with a unit of ingredient also appears at the bottom of table 3. Moreover‚ due to dietary restrictions‚ the following aspects
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Evaluate the opportunities and threats in the external environment facing the car industry in the UK There are many factors that affect the UK car industry. Some are internal factors and controlled by the manufacturer‚ others are external and cannot be controlled. Some external factors pose threats to the car industry and others present opportunities for manufacturers to adapt their cars to overcome a threat and create a unique solution that encourages the consumer to buy their product. The income
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Multiple Regression Analysis For hypotheses testing of this study‚ multiple regression analysis was conducted. Some assumptions of the relationship between dependent and independent variables need to be met for performing multiple regression analysis like‚ normality‚ linearity‚ homoscedasticity and multicollinearity (Hair et al.‚ 1998). As mentioned earlier‚ the required assumptions have already been met and multiple regression analysis was appropriate. Usually‚ multiple regression analyses
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