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### chap03

Course: 01 cis384, Fall 2009
School: University of...
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to Guide Networking Essentials, 5th ed., 14188-37180 Ch. 3 Solutions-1 Chapter 3 Solutions Review Questions 1. 2. Of the following cabling elements, which does not commonly occur in coaxial cable? d. cladding Which of the following is a common media characteristic? (Choose all that apply.) a. bandwidth rating b. interference susceptibility d. maximum segment length 3. What surrounds the center conductor in a...

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Michigan - ME - 240
Problem 18.1 A horizontal force F = 133.4 N is applied to the 1023 N refrigerator as shown. Friction is negligible. (a) (b) What is the magnitude of the refrigerators acceleration? What normal forces are exerted on the refrigerator by the oor at A and B ?
Michigan - ME - 240
Problem 20.1 The airplanes angular velocity relative to an earth-xed reference frame, expressed in terms of the body-xed coordinate system shown, is = 0.62i + 0.45j 0.23k (rad/s). The coordinates of point A of the airplane are (3.6, 0.8, 1.2) m. What is t
Michigan - ME - 240
Problem 12.1 The value of is 3.1415962654. . . . . If C is the circumference of a circle and r is its radius, determine the value of r/C to four signicant digits.Solution:C = 2 r 1 r = = 0.159154943. C 2 r = 0.1592 CTo four signicant digits we havePro
Michigan - ME - 240
Problem 14.1 In Active Example 14.1, suppose that the coefcient of kinetic friction between the crate and the inclined surface is k = 0.12. Determine the distance the crate has moved down the inclined surface at t = 1 s.20Solution: There are three unkno
Michigan - ME - 240
Problem 16.1 The 20-kg crate is stationary at time t = 0. It is subjected to a horizontal force given as a function of time (in newtons) by F = 10 + 2t 2 . Determine the magnitude of the linear impulse exerted on the crate from t = 0 to t = 4 s. (b) Use t
Michigan - ME - 240
Problem 13.1 In Example 13.2, suppose that the vehicle is dropped from a height h = 6m. (a) What is the downward velocity 1 s after it is released? (b) What is its downward velocity just before it reaches the ground?Solution: The equations that govern th
Michigan - ME - 240
Problem 15.1 In Active Example 15.1, what is the velocity of the container when it has reached the position s = 2 m?AsSolution: The 180-kg container A starts from rest at s = 0. The horizontal force (in newtons) is F = 700 150s . The coefcient of kinet
Michigan - ME - 240
Problem 17.1 In Active Example 17.1, suppose that at a given instant the hook H is moving downward at 2 m/s. What is the angular velocity of gear A at that instant?200 mm 50 mm A B 100 mmSolution: The angular velocity of gear B isB = vH 2 m/s = = 20 ra
Michigan - ME - 240
Problem 19.1 The moment of inertia of the rotor of the medical centrifuge is I = 0.2 kg-m2 . The rotor starts from rest and the motor exerts a constant torque of 0.8 N-m on it. How much work has the motor done on the rotor when the rotor has rotated throu
Michigan - ME - 240
Problem 21.1 In Active Example 21.1, suppose that the pulley has radius R = 100 mm and its moment of inertia is I = 0.005 kg-m2 . The mass m = 2 kg, and the spring constant is k = 200 N/m. If the mass is displaced downward from its equilibrium position an
Punjab Engineering College - ECON - ECON111
Chapter 7Hypothesis Tests and Confidence Intervals in Multiple RegressionSolutions to Exercises1. Regressor College (X1) Female (X2) Age (X3) Ntheast (X4) Midwest (X5) South (X6) Intercept 12.69* (0.14) 4.40* (1.05) (1) 5.46* (0.21) 2.64* (0.20) (2) 5.
Punjab Engineering College - ECON - ECON111
PART TWO Solutions to Empirical ExercisesChapter 3Review of StatisticsSolutions to Empirical Exercises1. (a) Average Hourly Earnings, Nominal \$'s Mean AHE1992 AHE2004 AHE2004 - AHE1992 (b) Average Hourly Earnings, Real \$2004 Mean AHE1992 AHE2004 AHE20
Punjab Engineering College - ECON - ECON111
Chapter 5Regression with a Single Regressor: Hypothesis Tests and Confidence IntervalsSolutions to Empirical Exercises1. (a) AHE = 3.32 + 0.45 Age (0.97) (0.03) The t-statistic is 0.45/0.03 = 13.71, which has a p-value of 0.000, so the null hypothesis
Punjab Engineering College - ECON - ECON111
Chapter 6Linear Regression with Multiple RegressorsSolutions to Empirical Exercises1. Regressions used in (a) and (b) Model Regressor Beauty Intro OneCredit Female Minority NNEnglish Intercept SER 2 R a 0.133 b 0.166 0.011 0.634 0.173 0.167 0.244 4.07
Punjab Engineering College - ECON - ECON111
Chapter 7Hypothesis Tests and Confidence Intervals in Multiple RegressionSolutions to Empirical Exercises1. Estimated Regressions Model Regressor Age Female Bachelor Intercept 3.32 (0.97) 8.66 0.023 0.022 7.88 0.190 0.190 a 0.45 (0.03) b 0.44 (0.03) 3.
Punjab Engineering College - ECON - ECON111
Chapter 13Experiments and Quasi-ExperimentsSolutions to Empirical Exercises1. The following table provides answers to (a)(c) Dependent Variable = Call_Back Regressor Black Female Black High High Black Intercept 0.097* (0.006) 0.097* (0.006) 0.073* (0.0
Punjab Engineering College - ECON - ECON111
Chapter 4Linear Regression with One RegressorSolutions to Exercises1.(a) The predicted average test score is(b) The predicted change in the classroom average test score isTestScore = (-5.82 19) - (-5.82 23) = 23.28 ^ (c) Using the formula for 0 in E
Punjab Engineering College - ECON - ECON111
Chapter 5Regression with a Single Regressor: Hypothesis Tests and Confidence IntervalsSolutions to Exercises1 (a) The 95% confidence interval for 1 is cfw_-5.82 1.96 2.21, that is -10.152 1 -1.4884. (b) Calculate the t-statistic: t act = ^ 1 - 0 -5.82
Punjab Engineering College - ECON - ECON111
Chapter 6Linear Regression with Multiple RegressorsSolutions to Exercises1. By equation (6.15) in the text, we know R2 = 1 n 1 (1 R 2 ). n k 1Thus, that values of R 2 are 0.175, 0.189, and 0.193 for columns (1)(3). 2. (a) Workers with college degrees
Punjab Engineering College - ECON - ECON111
Chapter 4Linear Regression with One RegressorSolutions to Empirical Exercises1. (a) AHE = 3.32 + 0.45 Age Earnings increase, on average, by 0.45 dollars per hour when workers age by 1 year. (b) Bobs predicted earnings = 3.32 + 0.45 26 = \$11.70 Alexiss
Punjab Engineering College - ECON - ECON111
Punjab Engineering College - ECON - ECON111
Punjab Engineering College - ECON - ECON111
Punjab Engineering College - ECON - ECON111
Chapter 8Nonlinear Regression FunctionsSolutions to Exercises1. (a) The percentage increase in sales is 100 198196196 = 1.0204%. The approximation is 100 [ln (198) ln (196)] = 1.0152%. (b) When Sales2002 = 205, the percentage increase is 100 205196196
Punjab Engineering College - ECON - ECON111
Chapter 9Assessing Studies Based on Multiple RegressionSolutions to Exercises1. As explained in the text, potential threats to external validity arise from differences between the population and setting studied and the population and setting of interes
Punjab Engineering College - ECON - ECON111
Chapter 10Regression with Panel DataSolutions to Exercises1. (a) With a \$1 increase in the beer tax, the expected number of lives that would be saved is 0.45 per 10,000 people. Since New Jersey has a population of 8.1 million, the expected number of li
Punjab Engineering College - ECON - ECON111
Chapter 13Experiments and Quasi-ExperimentsSolutions to Exercises1. For students in kindergarten, the estimated small class treatment effect relative to being in a regular class is an increase of 13.90 points on the test with a standard error 2.45. The
Punjab Engineering College - ECON - ECON111
PART ONE Solutions to Chapter ExercisesChapter 2Review of ProbabilitySolutions to Exercises1. (a) Probability distribution function for Y Outcome (number of heads) probability Y=0 0.25 Y=1 0.50 Y=2 0.25(b) Cumulative probability distribution function
Punjab Engineering College - ECON - ECON111
Chapter 3Review of Statistics Review the ConceptsSolutions to Exercises1. The central limit theorem suggests that when the sample size ( n ) is large, the distribution of the2 2 sample average ( Y ) is approximately N Y , Y with Y = 2 Y = 43.0, we hav
Punjab Engineering College - ECON - ECON111
CHAPTER 21POLITICAL ECONOMICSThe problems in this final chapter are of two general types. First are four problems in traditional welfare economics (Problems 21.121.3 and 21.5) that illustrate various issues that arise in comparing utility among individu
Punjab Engineering College - ECON - ECON111
CHAPTER 2THE MATHEMATICS OF OPTIMIZATIONThe problems in this chapter are primarily mathematical. They are intended to give students some practice with taking derivatives and using the Lagrangian techniques, but the problems in themselves offer few econo
Punjab Engineering College - ECON - ECON111
CHAPTER 3PREFERENCES AND UTILITYThese problems provide some practice in examining utility functions by looking at indifference curve maps. The primary focus is on illustrating the notion of a diminishing MRS in various contexts. The concepts of the budg
Punjab Engineering College - ECON - ECON111
CHAPTER 4UTILITY MAXIMIZATION AND CHOICEThe problems in this chapter focus mainly on the utility maximization assumption. Relatively simple computational problems (mainly based on CobbDouglas and CES utility functions) are included. Comparative statics
Punjab Engineering College - ECON - ECON111
CHAPTER 5INCOME AND SUBSTITUTION EFFECTSProblems in this chapter focus on comparative statics analyses of income and own-price changes. Many of the problems are fairly easy so that students can approach the ideas involved in shifting budget constraints
Punjab Engineering College - ECON - ECON111
CHAPTER 6DEMAND RELATIONSHIPS AMONG GOODSTwo types of demand relationships are stressed in the problems to Chapter 6: cross-price effects and composite commodity results. The general goal of these problems is to illustrate how the demand for one particu
Punjab Engineering College - ECON - ECON111
CHAPTER 7PRODUCTION FUNCTIONSBecause the problems in this chapter do not involve optimization (cost minimization principles are not presented until Chapter 8), they tend to have a rather uninteresting focus on functional form. Computation of marginal an
Punjab Engineering College - ECON - ECON111
CHAPTER 8COST FUNCTIONSThe problems in this chapter focus mainly on the relationship between production and cost functions. Most of the examples developed are based on the Cobb-Douglas function (or its CES generalization) although a few of the easier on
Punjab Engineering College - ECON - ECON111
Chapter 8Strategy and Game TheoryGame Theory Game theory studies strategic interactions Game theory models portray complex strategic situations in a highly simplified and stylized setting abstract from personal and institutional details to get a mathem
Punjab Engineering College - ECON - ECON111
Chapter 8Strategy and Game TheoryGame Theory Game theory studies strategic interactions Game theory models portray complex strategic situations in a highly simplified and stylized setting abstract from personal and institutional details to get a mathem
Punjab Engineering College - ECON - ECON111
CHAPTER 9PROFIT MAXIMIZATIONProblems in this chapter consist mainly of applications of the P = MC rule for profit maximization by a price-taking firm. A few of the problems (9.29.5) ask students to derive marginal revenue concepts, but this concept is n
Punjab Engineering College - ECON - ECON111
Chapter 9Production FunctionsProduction Function The firms production function for a particular good (q) shows the maximum amount of the good that can be produced using alternative combinations of capital (k) and labor (l)q = f(k,l)Marginal Physical
Punjab Engineering College - ECON - ECON111
CHAPTER 10THE PARTIAL EQUILIBRIUM COMPETITIVE MODELThe problems in this chapter focus on competitive supply behavior in both the short and long runs. For short-run analysis, students are usually asked to construct the industry supply curve (by summing f
Punjab Engineering College - ECON - ECON111
Chapter 10Cost FunctionsDefinitions of Costs Accounting and economic costs are different Accountants stress out-of-pocket expenses, depreciation, and other bookkeeping entries economists focus more on opportunity cost Labor Costs to accountants, labor
Punjab Engineering College - ECON - ECON111
CHAPTER 11APPLYING THE COMPETITIVE MODELThe problems in this chapter are intended to illustrate the types of calculations made using simple competitive models for applied welfare analysis. Usually the problems start from a supply-demand framework much l
Punjab Engineering College - ECON - ECON111
Chapter 11Profit MaximizationThe Nature of Firms A firm is an association of individuals who have organized themselves for the purpose of turning inputs into outputs Different individuals will provide different types of inputs the nature of the contrac
Punjab Engineering College - ECON - ECON111
CHAPTER 12GENERAL EQUILIBRIUM AND WELFAREThe problems in this chapter focus primarily on the simple two-good general equilibrium model in which supply is represented by the production possibility frontier and demand by a set of indifference curves. Beca
Punjab Engineering College - ECON - ECON111
Chapter 12The Partial Equilibrium Competitive ModelMarket Demand Assume that there are only two goods (x and y) An individuals demand for x isMarket demand for X = x i ( px , py , I i )i =1nMarket DemandXpxIndividual 1s demand curvepxIndividu
Punjab Engineering College - ECON - ECON111
CHAPTER 13MONOPOLYThe problems in this chapter deal primarily with marginal revenue-marginal cost calculations in different contexts. For such problems, students primary difficulty is to remember that the marginal revenue concept requires differentiatio
Punjab Engineering College - ECON - ECON111
Chapter 13General Equilibrium and WelfarePerfectly Competitive Price System We assume all markets are perfectly competitive a large number of homogeneous goods both consumption goods and factors of production each good has an equilibrium price there
Punjab Engineering College - ECON - ECON111
CHAPTER 14TRADITIONAL MODELS OF IMPERFECT COMPETITIONThe problems in this chapter are of two types: analytical and essay. The analytical problems look at a few special cases of imperfectly competitive markets for which tractable results can be derived.
Punjab Engineering College - ECON - ECON111
Chapter 14MonopolyMonopoly A monopoly is a single supplier to a market This firm may choose to produce at any point on the market demand curve A monopoly exists because other firms find it unprofitable or impossible to enter the market Barriers to entr
Punjab Engineering College - ECON - ECON111
CHAPTER 15GAME THEORY MODELS OF PRICINGThe first six problems for this chapter are intended to illustrate the concept of Nash equilibrium in a variety of contexts. Many of them have only modest economic content, but are traditional game theory problems.
Punjab Engineering College - ECON - ECON111
Chapter 15Imperfect CompetitionShort-Run Decisions: Pricing &amp; Output When there are only a few firms in a market, predicting output and price can be difficult how aggressively do firms compete? how much information do firms have about rivals? how ofte
Punjab Engineering College - ECON - ECON111
CHAPTER 16LABOR MARKETSBecause the subject of labor demand was treated extensively in Chapter 9, the problems in this chapter focus primarily on labor supply and on equilibrium in the labor market. Most of the labor supply problems (16.116.6) start with
Punjab Engineering College - ECON - ECON111
CHAPTER 17CAPITAL MARKETSThe problems in this chapter are of two general types: (1) those that focus on intertemporal utility maximization and (2) those that ask students to make present discounted value calculations. Before undertaking the PDV problems
Punjab Engineering College - ECON - ECON111
CHAPTER 18UNCERTAINTY AND RISK AVERSIONMost of the problems in this chapter focus on illustrating the concept of risk aversion. That is, they assume that individuals have concave utility of wealth functions and therefore dislike variance in their wealth
Punjab Engineering College - ECON - ECON111
CHAPTER 19THE ECONOMICS OF INFORMATIONThe problems in this chapter stress the economic value of information and illustrate some of the consequences of imperfect information. Only a few of the problems involve complex calculations or utilize calculus max
Punjab Engineering College - ECON - ECON111
CHAPTER 20EXTERNALITIES AND PUBLIC GOODSThe problems in this chapter illustrate how externalities in consumption or production can affect the optimal allocation of resources and, in some cases, describe the remedial action that may be appropriate. Many
Yale - STAT - 680
Week 1 Lecture 1 An overview Introduction: Parametric Estimation vs. Nonparametric Estimation I: Parametric density estimation : Let Y1 , Y2 , . . . , Yn i.i.d. with density f (x), 2 R (or R2 , or R10 ). For instance, &quot; # 2 (x ) 1 exp ; 2 R; &gt; 0. f ; (x)
Yale - STAT - 680
Week 13 Lecture 24 Adaptive Wavelet Estimation Donoho and Johnstone (1995, JASA). Sketch of the proof. Consider the sequence model where yi = i + zi , i = 1; :; d and zi are independent normal N (0; 1) variables. Set r( ) = d 1 Pk^ k2 . The stein s 2 unbi
Yale - STAT - 680
Week 2 Lecture 3 General m . n Model: Let 2 Y1 ; Y2 , o. . , Yn i.i.d. R f; f (m) (x) dx M b Goal: Find f such that Z b f (x) f sup Ef 2Fon [0; 1] with density f 2 F, F =2CM n2m=(2m+1)(Note that K may not be nonnegative). The bias part is Z b Efn (x