Economics 141 (Intro to Econometrics) Professor Yang Spring 2001 Answers to Midterm Test No. 1 1. Consider a regression model of relating Y (the dependent variable) to X (the independent variable) Yi = (0 + (1Xi+ (i where (i is the stochastic or error term. Suppose that the estimated regression equation is stated as Yi = (0 + (1Xi and ei is the residual error term. A. What is ei and define it precisely. Explain how it is related to (i. ei is the residual
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Adv. Physics – Unit 1 Homework Linear Motion (Ch. 2 & 3) Essential Questions: 1) How would you describe constant and accelerated motions? 2) How is motion represented graphically and analytically? 3) How does an x vs. t graph differ between constant and accelerated motions? P. 52-53 #46‚ 48‚ 50‚ 53 P. 80-83 #58‚ 59‚ 87‚ 89‚ 98‚ 106 If I don’t give the answer‚ you will have to determine it yourself. SHOW YOUR WORK! P. 52 50) 1.5x1011 m 53) 1.8 min P. 80 87) a. 75 m b. 150
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cancerous cells. It has been observed that upon raising the cell temperature beyond 43°C [1] for a specified amount of time‚ necrosis of the biological cells can be achieved. Further‚ coupled with the temperature rise‚ successful destruction of the cancerous cells also requires a specified exposer tissue [2]. Robinson et al. [3] observed that a local temperature rise beyond 53°C for an exposure time of up to 1 s would ensure a complete destruction of the cancerous
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Linear Programming Model in Operation Research study is usually mathematical type of model which contains set of equations that represent objective function and constraints. The keywords in this article are Objective Function and Constraints‚ according to Heizer & Render (2008) Objective Function are mathematical expression expressed in linear programming designed to maximizes or minimizes some quantity‚ for example profit can maximized while the cost might be reduced. The objective function is also
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As the Chief Executive Officer of Sierra Lighthouse Hotel Freetown‚ I’ve been provided with an Organisational Performance and Customer Satisfaction equation: Consumer Expected Quality - Organisational Actual Quality = Customer Perceived Quality EQ > AQ => Dissatisfaction EQ = AQ => Mere Satisfaction AQ > EQ => Delighted Customer An Organization Performance includes multiple activities‚ that help in establishing the goals of the organization‚ and monitor the progress towards the target
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Significance of the Value Equation for Global Marketers According to Keegan (2002)‚ the value equation can be considered as a guide to create perceived value for customers by any organization operating anywhere in the world. The value equation is known as V=B/P‚ where V is the value‚ B is benefits and P is price. The value can be increased in two ways‚ by increasing the numerator ‘benefits’ or by reducing the denominator ‘price’. Keegan (2002) elaborates that the benefits can be increased by
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Assignment 1 NPV: = -PF + FV /(1+r) PV = FV/(1+r) or PV = C1/1-r + C2/(1-r)2 + .. + CT/(1-r)T Rate of return: R=(Vf-Vi)/Vf Rate r compounded m times a year: FV = C(1+r/m)mt 10% semiannually = 10.25% annually‚ Hence 10.25 is said to be the Effective Annual Yield (EAY) 1+EAY = (1+r/m)mt Assignment 2 Perpetuity The value of D received each year‚ forever: PV = D/r Annuity The value of D received each year for T years: PV = (D/r)*[1 – 1/(1+r)T] Growing Perpetuity PV = D/(R-g) R: the
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Linear Variable Displacement Transducer (LVDT): A very basic transducer which is always useful in the field of instrumentation‚ I have studied about this in my college days. Now let me explain about the LVDT with its Principle of Operation and I will explain how it is constructed for its well known operation and you can understand the working of LVDT. Principle of LVDT: LVDT works under the principle of mutual induction‚ and the displacement which is a non-electrical energy is converted into an
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Writing ionic equations for redox reactions You can split the ionic equation into two parts‚ and look at it from the point of view of the magnesium and of the copper(II) ions separately. This shows clearly that the magnesium has lost two electrons‚ and the copper(II) ions have gained them. These two equations are described as "electron-half-equations" or "half-equations" or "ionic-half-equations" or "half-reactions" - lots of variations all meaning exactly the same thing! Any redox reaction
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LINEAR REGRESSION MODELS W4315 HOMEWORK 2 ANSWERS February 15‚ 2010 Instructor: Frank Wood 1. (20 points) In the file ”problem1.txt”(accessible on professor’s website)‚ there are 500 pairs of data‚ where the first column is X and the second column is Y. The regression model is Y = β0 + β1 X + a. Draw 20 pairs of data randomly from this population of size 500. Use MATLAB to run a regression model specified as above and keep record of the estimations of both β0 and β1 . Do this 200 times. Thus you
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