Sample Exam Solutions Problem 1 (Hypothesis testing) A company that manufactures travel goods is particularly concerned that the mean weight of the roll-on cabin bags should not exceed 3 kg as many airlines limit the weight of carry-on luggage on their planes to 7 kg. Past experience allows the assumption that the std. dev = 0.03 kg. A sample of 50 cabin bags is selected and the sample mean is 3.009 kg. Using a 0.05 significance‚ conduct a hypothesis test to determine if the population mean weight
Premium Statistical hypothesis testing Statistics Statistical significance
(-3.5)/1.6396 = -2.1347 Critical Value: Zα/2= Z0.05/2= @qnorm(1-0.05/2)= 1.96 When comparing the test statistic to the critical value: Z=2.1347>1.96‚ we reject the null hypothesis. We can calculate the P-value using the EViews command: Show @tdist (t‚ d.f) In this EViews command‚ t stands for the appropriate test statistic and d.f are the degrees of freedom. The appropriate test statistic was calculated above‚ namely Z=2.1347. For the degrees of freedom‚ we can insert NA+NB-2. Show @tdist (2
Premium Statistics Null hypothesis Statistical hypothesis testing
Economics 1103 080 - Principles of Macroeconomics PRACTICE Midterm Exam Part A: Multiple Choice (30 marks) Answer the following questions on the scantron sheet. 1. Which of the following goods best meets the definition of scarcity? a) air b) water in the ocean c) water in a city d) wood in a forest 2. When the government attempts to cut the economic pie into more equal slices‚ what happens? a) It is easier to cut the pie‚ and therefore the economy can produce a larger pie. b) The
Premium Inflation Economics Minimum wage
Trajico‚ Maria Liticia D. BSEd III-A2 REFLECTION The first thing that puffs in my mind when I heard the word STATISTIC is that it was a very hard subject because it is another branch of mathematics that will make my head or brain bleed of thinking of how I will handle it. I have learned that statistic is a branch of mathematics concerned with the study of information that is expressed in numbers‚ for example information about the number of times something happens. As I examined on what
Premium Psychology Learning Knowledge
Midterm Exam Section 1: Definition of terms. Authority: the power or right to give orders‚ make decisions‚ and enforce obedience. e.g.: In the presidential election‚ the winning party takes office without a struggle or show of military force because everyone understands the legitimacy of its newly won authority. It is important because the orders made from a government without authority will not be implemented. Power: the political power is the ability to shape and control the political
Premium President of the United States United States Constitution United States
CHM2330 (Winter 2015) Midterm # 1 Review Short answer questions - 9 Long answer questions - 15 Possible bonus questions - 5 Short Answer Questions: 1) Draw the Maxwell Distribution graph‚ with all axis labeled as well as descriptions of each curve. 2) What does the correspondence principle state? 3) What is the ultraviolet catastrophe? What is one of the consequences of the ultra violet catastrophe? 4) What does the de Broglie hypothesis state? 5) Write down the integrals which describe orthonormal
Premium Quantum mechanics
Operations Management - OM726 - SAMPLE Midterm Questions 1. UBurger is a fastfood restaurant whose windows announce its focus on burgers‚ fries‚ and shakes. After perhaps queueing‚ customers place an order with and pay a cashier‚ then await completion of the order. Upon receiving the order‚ 25% of customers depart‚ and the remaining 75% proceed to the seating area‚ where they sit for an average of 40 minutes before departing. The restaurant has 25 seats‚ and assume that they are fully
Premium Variable cost Process management Cost
JUS 485 Midterm Exam Answer the following questions‚ which are based upon the first four modules of the course. 1. Explain why it is that evidence gained through the forensic science process is almost always considered to be circumstantial evidence. The most important fact that makes forensic evidence circumstantial is because science cannot be clearly defined by law. The legal system have created standards and written legal rules regarding the admissibility of forensic evidence. When forensic
Premium Questioned document examination Evidence law Fingerprint
space in her apartment to hang 4 of them on a wall. The number of different arrangements of four pictures from a selection of ten pictures is: A.5‚040 B.24 C.151‚200 D.210 The failure rate for taking the bar exam in Philadelphia is 41%. If 375 people take the bar exam‚ what is the mean for the number of failures? A.138.1 B.171.2 C.90.7 D.153.8 A researcher surveyed college students to study their opinion about the proposed change in smoking rules. The researcher asked a
Premium Normal distribution Standard deviation Variance
512 Midterm Exam The answers: 1a.Before defining and explaining science as product‚ I would like to explain first what is the purpose beyond studying research methods? First‚ we study‚ research method to consume the research evidence. Moreover‚ as a student‚ to satisfy curiosity or will help in fulfill the research requirements. As a communication scholar‚ to keep up with the latest developments in the field. What about as critical consumer‚ it helps the consumer to make useful decisions about
Premium Scientific method