Scores on an employee performance evaluation are normally distributed with a mean of 75 and a standard deviation of 10. a. What is the probability that a randomly selected employee will score below 65? b. What is the probability that a randomly selected employee will score between 70 and 80?Sketch and solve for A. and B.

Scores on an employee performance evaluation are normally distributed with a mean of 75 and a standard deviation of 10. a. What is the probability that a randomly selected employee will score below 65? b. What is the probability that a randomly selected employee will score between 70 and 80?Sketch and solve for A. and B.

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter10: Introduction To Simulation Modeling

Section: Chapter Questions

Problem 41P: At the beginning of each week, a machine is in one of four conditions: 1 = excellent; 2 = good; 3 =...

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At the beginning of each week, a machine is in one of four conditions: 1 = excellent; 2 = good; 3 = average; 4 = bad. The weekly revenue earned by a machine in state 1, 2, 3, or 4 is 100, 90, 50, or 10, respectively. After observing the condition of the machine at the beginning of the week, the company has the option, for a cost of 200, of instantaneously replacing the machine with an excellent machine. The quality of the machine deteriorates over time, as shown in the file P10 41.xlsx. Four maintenance policies are under consideration: Policy 1: Never replace a machine. Policy 2: Immediately replace a bad machine. Policy 3: Immediately replace a bad or average machine. Policy 4: Immediately replace a bad, average, or good machine. Simulate each of these policies for 50 weeks (using at least 250 iterations each) to determine the policy that maximizes expected weekly profit. Assume that the machine at the beginning of week 1 is excellent.
Selection and employment of the correct estimation method is: Multiple Choice O O O Easy once the data is gathered. Relatively easy because only two effective methods exist. Dependent on the accuracy/cost tradeoff for the estimation objectives. Primarily subjective in nature. Difficult because so many effective methods are available.
A local manufacturing firm which produces engineer to order and assemble to order high value products for the pharmaceutical industry has recently been requested by its owner to provide a proposal on the benefits of a predictive performance model and methodology from a workshop that you have recently completed. You are requested to produce the following report: 1. Review the current state of the practice of performance reporting within firms. 2. Suggest a suite of appropriate key performance measures. 3. Explain the benefits of an Ex-Ante or Predictive Performance approach to enterprise performance management. 4. Recommend a methodology on how this type of Enterprise Performance Model might be deployed within actual firms. It is recommended that you use appropriate examples from the literature or your prior industrial experience to support any recommendations that you provide.
5. A sample of job applicants is selected to analyze the number of years of experience the job applicants have. The data set is: {1, 3, 3, 1, 2}. Calculate the mean number of years of experience. 4. A sample of job applicants is selected to analyze the number of years of experience the job applicants have. The data set is: {1, 3, 3, 1, 2}. Calculate the standard deviation of the number of years of experience. 3. A sample of job applicants is selected to analyze the number of years of experience the job applicants have. The data set is: {1, 3, 3, 1, 2}. What can you conclude about the sample? Group of answer choices 2. A sample of job applicants is selected to analyze the number of years of experience the job applicants have. The data set is: {1, 3, 3, 1, 2}. Calculate the variance of the number of years of experience. 1. A sample of job applicants is selected to analyze the number of years of experience the job applicants have. The data set is: {1, 3, 3, 1, 2}. Calculate the…
1.The reported unemployment is 5.5% of the population. What measurement scale is used to measure unemployment? Interval Nominal Ordinal Ratio 2.Which one of the following is NOT an example of discrete data? Number of employees reporting in sick Number of households watching the Home Shopping Network Number of miles between New York City and Chicago Number of members of the Denver Lions Club
A town's department of public works is concerned about adverse public reaction to a sewer project that is currently in progress. Because of this, the Commissioner of Public Works has authorized a weekly survey to be conducted of town residents. Each week, for a total of 10 weeks, a sample of 100 residents is questioned on their feelings towards the project. Number of responndets who opposed (each week, respectively): 7, 20, 18, 12, 20, 20, 6, 19, 24, 24.Analyze this data using an appropriate control chart (three sigma control limits). Is the community sentiment stable? a. Unstable, 3 observations out of control b. Unstable, 1 observation out of control c. Unstable, 2 observations out of control d. Stable
Job satisfaction (When you first read about this exercisebreak plan in Chapter 23, you did not have an inferencemethod that would work. Try again now.) A companyinstitutes an exercise break for its workers to see if it willimprove job satisfaction, as measured by a questionnairethat assesses workers’ satisfaction. Scores for 10 randomlyselected workers before and after the implementation ofthe exercise program are shown in the table.a) Identify the procedure you would use to assess theeffectiveness of the exercise program, and check to seeif the conditions allow the use of that procedure.b) Test an appropriate hypothesis and state yourconclusion.c) If your conclusion turns out to be incorrect, what kindof error did you commit? WorkerNumberJob Satisfaction IndexBefore After1 34 332 28 363 29 504 45 415 26 376 27 417 24 398 15 219 15 2010 27 37
(c) Based on what we know about Observation B, if the cutoff value is lowered to 0.2, what happens to the values of sensitivity and specificity? Explain. Use the ROC curve to estimate the values of sensitivity and specificity for a cutoff value of 0.2. If required, round your answers to three decimal places. Do not round intermediate calculations. Answer Part C, there are no other parts here. I have the sensitivity already and is equal to 1. What is the specificity??If you are not 100% sure you are right, do not attempt this is frustrating. The cutoff value has changed from 0.5 to 0.2. The sensitivity is 1 which is correct. I need help with the specificity. Sensitivity does not equal 1/14 and specificity does not equal 1/31 so don't answer that and do not answer any other parts just answer part C.
A scientist works in a lab with four summer interns and, as it is the end of the summer, he anticipates the head of the lab will ask him which of them he wants to retain. In terms of quality, the scientist and the head of the lab agree that intern A is better than intern B who is better than intern C who is better than intern D. The scientist would like to keep as many interns as possible and, given any number, the highest-quality ones. However, due to funding restrictions, the head of the lab wants to limit the number of interns that are retained. The head of the lab initially tells the scientist to select two interns to retain. After the scientist chooses two interns, the head of the lab decides whether to allow the scientist to retain a third intern. Thus, the sequence of moves is: 1) the scientist chooses two interns (both of whom are then retained); 2) the head of the lab decides either to allow the scientist to choose a third or not; and possibly 3) if the head of the lab chose…
This is all one question: The following set of questions were developed to administer to the customers of a food catering business. Put yourself in the position of a customer who has ordered food from this catering business at least one time in the past. You have just received this survey in an e‐mail from the catering company. The e‐mail contains a link that takes you to a Web‐based survey process (such as Google Forms or SurveyMonkey). As you read each question, evaluate it carefully. Is it easy to answer? Do understand how to answer? Is there any confusion in your mind about what response is expected? Do you think your answer will be meaningful and useful to the system development team? What is your company's name? On a scale from 1 to 10, how easy do you find the ordering process? 0‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐10 How long does it take to place a catering request? In your opinion, what is the biggest problem with the current system of…
A firm has modeled its experience with industrial accidents and found that the number of accidents per year is related to the number of employees by the regression equation Y = 6.6 + 0.098*X. R-Square is 0.72. The regression is based on 20 annual observations. The firm intends to employ 480 workers next year. How many accidents do you project? 47.04 accidents 8.66 accidents 53.64 accidents 72% of the 480 workers 28.56 accidents
South Africa Airways would like to monitor its airline’s performance. Each week for the past 20 weeks, they checked each week a random sample of 100 flight arrivals for “one-time” performance. The table that follows contains the number of flights that did not meet South Africa Airways definition of “one time”: Week Late flights 1 2 2 4 3 10 4 4 5 1 6 1 7 13 8 9 9 11 10 0 11 3 12 4 13 2 14 2 15 8 16 2 17 3 18 7 19 3 20 2 Calculate the upper and lower control limits for this chart.