The average number of hours for a random sample of amazon orders for a specific product was 39 hours last year. It is believed that the opening of a nearby warehouse has led to a reduction in the shipping and delivery time. To test the validity of this belief, the hypotheses are Select one: o a. Ho : µ < 39, H. : µ > 39 o b. Ho : µ > 39, H. : µ < 39 o . Ho : µ = 39, Ha : µ ± 39 o d. None of the above

The average number of hours for a random sample of amazon orders for a specific product was 39 hours last year. It is believed that the opening of a nearby warehouse has led to a reduction in the shipping and delivery time. To test the validity of this belief, the hypotheses are Select one: o a. Ho : µ < 39, H. : µ > 39 o b. Ho : µ > 39, H. : µ < 39 o . Ho : µ = 39, Ha : µ ± 39 o d. None of the above

ENGR.ECONOMIC ANALYSIS

14th Edition

ISBN:9780190931919

Author:NEWNAN

Publisher:NEWNAN

Chapter1: Making Economics Decisions

Section: Chapter Questions

Problem 1QTC

See similar textbooks

Similar questions

An 18-month-old child was admitted to the hospital after falling into a hot bath. Two weekslater, she was doing well and set to return home. Her mother noticed that the little girl askedfor a drink every time she saw one, and she often sucked on a wet washcloth. When thechild’s mother asked about this behavior, the nurses told her it was normal—they would notask a physician for permission to give the girl a drink. The nurses told the mother that herchild was doing well and that she should go home and get some sleep.When the mother returned early the next morning, she knew that something was verywrong with her child. The medical team was notified. They administered naloxone, a drugused to block the effects of opioids. They finally allowed the girl to have a drink, and she swallowed a liter of juice. The medical team determined that the girl should not be given anymore narcotics. They gave verbal orders.A nurse entered the girl’s room that afternoon with a syringe of methadone. The…
10 Suppose that in a particular state a standardized test is given to all graduating se- niors. Let score denote a student's score on the test. Someone discovers that perfor- mance on the test is related to the size of the student's graduating high school class. The relationship is quadratic: score = 45.6+ .082 class .000147 class², where class is the number of students in the graduating class. (i) How do you literally interpret the value 45.6 in the equation? By itself, is it of much interest? Explain. (ii) From the equation, what is the optimal size of the graduating class (the size that maximizes the test score)? (Round your answer to the nearest integer.) What is the highest achievable test score? (iii) Sketch a graph that illustrates your solution in part (ii). (iv) Does it seem likely that score and class would have a deterministic relationship? That is, is it realistic to think that once you know the size of a student's graduating class you know, with certainty, his or her test…
You are studying the effects of smoking by pregnant women on rates of asthma in their children. You collect data on the number of cigarettes smoked per day and whether or not the child developed asthma by the age of two. The data is below: Smoked 1-5 cigarettes per day --- 9.2% developed asthma Smoked 6-10 cigarettes per day --- 10.3% developed asthma Smoked 11-20 cigarettes per day -- 25% developed asthma Smoked 21-40 cigarettes per day --- 34.8% developed asthma Smoked 41-60 cigarettes per day --- 38.4% developed asthma In order to study the relationship between the number of cigarettes smoked by pregnant women per day and the percentage of their children developed asthma by the age of two using statistical knowledge, we convert the above data into the following format and see if we can obtain an adequate fit using linear regression. Average number of cigarettes smoked per day 3 8 Percentage of children developed asthma What is the value of the correlation coefficient? Г 15-5 30.5…
om CENGAGE MINDTAP Q Search this co 201 Statistical Inference Hypothesis Testing Prob 2 Chapter 2 Assignment: BA 201 Statistical Inference Hypothesis Testing Prob 2 Chapter 2 Assigment Scre o0% Save Submit Assignment for Grading Questions Problem 06-33 (Hypothesis Tests) Quetion 1 of 1 eBook The national mean annual salary for a school administrator is $90,000 a year. A school official took a sample of 25 school administrators in the state of Ohio to learn about salaries in that state to see if they differed from the national average. Click on the datafile logo to reference the data. DATA file (a) Choose the hypotheses that can be used to determine whether the population mean annual administrator salary in Ohio differs from the national mean of $90,000. Ho:- Select your answer - Hạ:- Select your answer - V (b) The sample data for 25 Ohio administrators is contained in the file named Administrator. What is thep value for your hypothesis test in part (a)? If required, round your answer…
18. Car and Taxi Ages When the author visited Dublin, Ireland (home of Guinness Breweryemployee William Gosset, who first developed the t distribution), he recorded the ages of randomlyselected passenger cars and randomly selected taxis. The ages can be found from thelicense plates. (There is no end to the fun of traveling with the author.) The ages (in years) arelisted below. We might expect that taxis would be newer, so test the claim that the mean age ofcars is greater than the mean age of taxis.
da 13 Suppose that a researcher, by using a sample of transactions of residential houses, wants to estimate how the price of the houses is affected by the a non presence of an elevator in the building. To this end, he wants to regress the price of the house in thousands euro, price, on the dummy elevator indicating the presence of the elevator (dummy equal to 1) or not (dummy equal to 0). data Unfortunately, he makes a mistake so that he uses the original dummy divided by 100, so a variable that takes value 0.01 if there is an elevator in the building and 0 if not. agio max ontrassegna How the estimated value of the coefficient of the dummy will be affected by this mistake: nda O (a) It will be multiplied by 100 O (b) It will be divided by 100 O (c) It will change according to the proportion of flats in buildings with and without elevator O (d) None of the above Precedente Successivo
Candy is a Year 4 full-time undergraduate student majoring in marketing at a private university inHong Kong and she is going to be graduated after the summer break. She has collected some datafrom the Student Careers and Affairs Office (SCAO) related to her job planning.According to the graduate employment surveys conducted for the last two years by the privateuniversity, the average salary earned by the graduates of her programme is constant at around$14,000. Actually, Candy is quite disappointed.In view of this, Candy is considering to participate in an one-year internship program launched by theSCAO after her graduation. In other words, she would enter the job market “formally” one year laterif she joins the internship program. Finally, with the help of the SCAO, she could get an internshipoffer from a famous marketing company in Hong Kong. The monthly salary provided by the companyis $12,000 while a good reference letter would be prepared for the interns completing the…
ABC is an online-to-offline platform that sells e-commerce products to offline customersthrough a network of agents. ABC gives a commission to agents for each sale made. ABC has4 main product categories: electronics, fashion, supermarket, and others. Please refer to theexhibits for data sets pertaining to the questions below. Today is May 16 th . Question: The average basket size per purchase per agent in the fashion category in April is Rp.180.000,-. A third of agents made only 1 purchase that month. A third made 2 purchases that month. The rest made an average of 3.5 purchases that month. What % of agents in Aprilbought fashion? Answer: ________%
“Business Ethics is the application of ethical and moral principles or in a business environment. It deals with what is right and what wrong while doing business”. But to the contrary, evidences show that some business organizations are involved in different unethical practices to increase their profit at the risk of many people’s money, health and lives. As a business ethics student you are required to address the following questions: Describe five unethical practices adopted by business organizations in Oman. You may find it form newspapers, magazines etc. or from your own experiences and observation if any. And Analyze each of these unethical practices and explain how these unethical practices affect the people and society as a whole. And Suggest the ways to overcome each of these unethical practices.
Many of the survey questions focus on the used to pay for college, so the undergraduates in the sur ing for their parents. For example, each participant is asked to report how much of the parent's current income is used to pay for college. Do you think it is wise to combine responses across the parents and undergraduates? Are you fully aware of how much money your parents are spending and borrowing for college? The authors report overall averages and percents in their repon spond. Chapter 6 Introduction to Inference 350 We will also consider this a sample from one population but this is debatable certainly Average college savings fund contribution. One survey question asked ho much money from a college savings fund, such as a 529 plan, is used to pay an answer Nonresponse should ahways be considered as a source of bias. In this case, the nonresponse is very low, so we'll proceed by treating the n1593 sample as EXAMPLE 6.4 for college. Of the 1600 who were surveyed, n= 1593 provided a…
QUESTION 15 Suppose that if the null that alpha and beta both equal one is true a tost statistic you have calculated s dnitributed as an Fstatistic with 3 and 30 degroes of freedom for the numerator and denominator respectivoly What critical value cuts off 5% of the upper tal of this disitritution? OA.5.168 O B.9 277 OC8617 O D. None of the above
A binary variable is often called a: O A. residual. OB. power of a test. O C. dummy variable. O D. dependent variable.