Develop a regression model that can be used to predict the final average in the course based on the first test grade.
Problem 4-13Students in a management science class have just received their grades on the first test. The instructor has provided information about the first test grades in some previous classes as well as the final average for the same students. Some of those grades have been sampled and are as follows.Student 1 2 3 4 5 6 7 8 9First test grade 98 77 88 80 96 61 66 95 69Final average 93 78 84 73 84 64 64 95 76Develop a regression model that can be used to predict the final average in the course based on the first test grade.Predict the final average of a student who made an 83 on the first test.Give the values of r and r2 for this model. Interpret the value of r2 in the context of this problem.This must be done in excel and formulas must be present.Problem 4-14Using the data in 4-13, test to see if there is a statistically significant relationship between the grade on the first test and the final average at the 0.05 level of significance. Use the formulas in this chapter and appendix D. (See end of document for Appendix D).This must be done in Excel and formulas must be present.Problem 4-15Using computer software, find the least-squares regression line for the data in problem 4-13. Based on the F-test, is there a statistically significant relationship between the first test grade and the final average in the course?This must be done in Excel and formulas must be present.Problem 4-19Bus and subway ridership in Washington DC, during the summer months is believed to be heavily tied to the number of tourists visiting the city. During the past 12 years, the following data have been obtained:Year Number of tourists Ridership(1,000,000s) (1,000,000s)1 7 152 2 103 6 134 4 155 14 256 15 277 16 248 12 209 14 2710 20 4411 15 3412 7 17Plot these data and determine whether a linear model is reasonable.Develop a regression model.What is expected ridership if 10 million tourists visit the city?This must be done in Excel and formulas must be present.
What equation is used to find the vertex form of a parabola with the vertex (h, k)?
Step 2: Solve for coefficient a.a) What equation is used to find the vertex form of a parabola with the vertex (h, k)? (5 points)b) Solve for the coefficient a in the vertex form for the parabola in Daredevil Dannys practice jump using key aspects from step 1. As you solve for the coefficient, explain each step of the process in detail. (15 points)The picture of the question in the attached figure we know that The equation of a vertical parabola in vertex form is given by where a is the leading coefficient (h,k) is the vertex Looking at the graph we have a vertical parabola open downward (coefficient a is negative)The vertex is a maximum The vertex is the point (25.32) substitute in the equationc) What is the vertex form of the parabola from Daredevil Dannys practice jump? (5 points)Step 3: Change from vertex form to standard form.To get Daredevil Danny through the Flaming Hoop Jump of Awesome, you will need to know the values of a, b, and c, which are the coefficients of the quadratic equation in standard form.a) What is the equation for a parabola in standard form? (5 points)b) Convert the vertex form of the equation you wrote above to the standard form. (10 points)c) What are the values for coefficients a, b, and c in the quadratic equation for Daredevil Dannys practice jump? (5 points)
Why does it claim to be appropriate for the supply chain process or a component of the supply chain process? What are its strengths?
Look over the 20 top supply chain management software suppliers as of 2016 athttp://www.mmh.com/article/top_20_software_suppliers. Choose one supplier other than SAP or Oracle, and look over its website as it relates to supply chain management software. Why does it claim to be appropriate for the supply chain process or a component of the supply chain process? What are its strengths?Title your post with the name of the supplier that you chose.
Using StatCrunch, calculate the chi-square statistic and degrees of freedom for the following set of data for 300 people
Q: Using StatCrunch, calculate the chi-square statistic and degrees of freedom for the following set of data for 300 people:Is the value of the chi-square statistically significant at the 0.05 level?Q: Write a paragraph summarizing the results of the analysis in Exercise 1Q: Using StatCrunch, calculate the chi-square statistic and degrees of freedom for the following set of data for 180 people undergoing a knee replacement treatment with a drug supplement:Is the value of the chi-square statistically significant at the 0.05 level?Q: Match each of the nonparametric tests in Column A with its parametric counterpart in Column BQ: Using the information provided, indicate which statistical test you think should be used for each of the following situations:a. Independent variable: normal birth weight vs. low birth weight infants; dependent variable: breathing rate (in breaths per minute).b. Independent variable: time of measurement of same patient (before, during, and after surgery); dependent variable: heart rate.c. Independent variable: time of measurement (before, during, and after intervention); dependent variable: did vs did not exercise regularly.d. Independent variable: infertility treatment A vs infertility treatment B vs control condition; dependent variable: did vs did not become pregnant.Q: The relationship between cigarette smoking and major depressive disorder has been studied for decades. In the doc sharing area of the course, you will find an excel spreadsheet of data from a study on smoking and depression by the St Louis Epidemiologic Catchment Area Survey of the National Institute of Mental Health. The file is labeled Catchment Area Survey. Using this data set in StatCrunch, calculate the chi-square statistic and degrees of freedom for the items smoker and a measure of depression, FeltDown. Construct a contingency table for this data as we did in week 1. Be sure to include and label the row, column and total %s as well as the expected counts. Is the value of the chi-square statistically significant at the 0.05 level? Any reason to use a correction to the chi-square test here given your expected counts?
If there is no mission statement, how would your company benefit from developing one?
InstructionsDoes the current company you work for have a mission statement? If you do not currently work for a company, consider the last company you worked for. If there is a mission statement, do you think it is effective? If there is no mission statement, how would your company benefit from developing one? Your journal entry must be at least 200 words in length. No references or citations are necessary.
apply an eclectic approach to crisis intervention, using three different crisis intervention models.
Discussion 2: Eclectic Approach to Crisis InterventionThere are a number of crisis intervention theories and models. The goals of crisis intervention theories and models might include restoring survivors pre-crisis equilibrium, reframing survivors views and beliefs about disasters, crises, or traumas, or helping survivors choose effective behaviors and attitudes to cope with their situations. The developmental stages of individuals impacted by such events, and the interrelationships between such individuals and their environments, are important considerations when developing an effective crisis intervention approach.In this Discussion, you will apply an eclectic approach to crisis intervention, using three different crisis intervention models.To prepare for this Discussion:Consider how an eclectic approach to crisis intervention might be used to respond to disasters, crises, and traumas.Reflect on the crisis, disaster, or trauma you described in Discussion 1 this week.Identify three crisis intervention models you might use to respond to the disaster, crisis, or trauma.Think about how each model might inform strategies and/or techniques you employ to respond to survivors of the disaster, crisis, or trauma.
Explain the differences in the actions and behaviors in each of the two examples.
Unit 2 Assignment: Ethical Principles and Decision-MakingAttached Files:reasoning helps differentiate between right-thinking decision-making and actions that are wrong, hurtful, and harmful. In this writing assignment, you will consider your own decision-making processes and evaluate the application of those principles to other scenarios.Instructions:Choose one of the following three assignment options for your essay:1. Select a corporate leader in the news who acted legally but immorally, and one who acted illegally but morally. Explain the differences in the actions and behaviors in each of the two examples. What lessons can be learned from the examples? Cite Weiss in your response and incorporate at least one other reference you locate in the Post University library or online source into your essay. Provide a clear introduction, an organized set of paragraphs, and a conclusion.2. Read Case Study 1, Bernard L. Madoff Investment Securities LLC: Wall Street Trading Firm, and Case Study 3, Fords Pinto Fires: The Retrospective View of Fords Field Recall Coordinator. Compare and contrast the ethical decisionmaking principles applied or violated by Bernie Madoff and Dennis Gioia. Use the table on pages 56-57 to guide your thinking. Prepare your essay incorporating points from Weiss in your response in addition to one other reference source you locate in the Post University library or online source. Provide a clear introduction, organized body paragraphs, and a conclusion.3. Read Case Study 4, Jerome Kerviel: Rogue Trader or Misguided Employee: What Really Happened at the Societe Generale? Write an essay in which you first provide a 200-250 word summary of the case study using your own words. Then respond to questions 2, 3, and 5 on page 105. Cite Weiss in your response and incorporate one other reference you locate in the Post University library or BUS340 Business Ethics Ethical Principles and Decision-Making online source into your essay. Your submission should be written as an essay with an introduction, body paragraphs, and a conclusion. Do not include the questions in your response.
offer what metrics should be used to determine if the reorganized floor plan is effective.
Please discuss the case study,Improving Production at Beothic Fish, focusing the following elements of the case:Identify the problemDiagnose the cause(s)The case study indicates that the general manager plans on reorganizing the floor plan of the plant. Offer your recommendations on how to reorganize the floor plan. Please also offer what metrics should be used to determine if the reorganized floor plan is effective.
Discuss the application of Hersey and Blanchards situational theory of leader style to the level of follower development.
Discuss the application of Hersey and Blanchards situational theory of leader style to the level of follower development. Choose a leader who leveraged this style and discuss what, if anything, made it effective. Please support your response with scholarly sources.
Can you believe what the author tells you? Why or why not?
Question 1: An Application of Probability Decision TreesActions for An Application of Probability Decision Treesdecision treeThe readings are rather theoretical so I am including an application where knowing a probability value can be very helpful. There is a field in Management Science known as Decision Theory. We use probability to decide what the best course of action is given what we know. I attached some information showing a decision tree. It is a bit more complicated than the ice cream/soft drink problem but shows the structure of the tree with its paths or branches.Try the first ice cream/soft drink problem. We must decide what is the best course of action knowing possible payoffs and probabilities. Here we need the probability that the day will be warm or cold. This is a simple probability. We can find it empirically by counting warm and cold days in the past and dividing by the total number of days observed. In this problem we arrive at the probability of a warm day to be 0.6. Since we only consider two outcomes, the probability of a cold day is 0.4.Question 2:Hang Up and DriveActions for Hang Up and DriveCheck out this snippet from Family Circle magazine (January, 2009, Liz Plosser):Motorists who talk on a cell phone while driving are 9% slower to hit the brakes, 19% slower to resume normal speed after braking and four times more likely to crash.Interesting, eh? Need more information? Sorry, thats all the information this article provided. So, what can we conclude? How reliable are these results? Can you believe what the author tells you? Why or why not?Pretend youre a manager for one of the major cell phone service providers in the U.S. Youve been asked by a major news magazine to speak to these accusations. What would you say? Use your knowledge of statistics for managers to level some well-founded criticisms of the conclusions above.Careful! We cannot use personal opinions to battle statistics like these! Instead, you must explain why the numbers reported in Family Circle may, or may not, accurately represent the population of U.S. drivers. There are 100 possible answers to this conference topic.You need only provide a single idea, to get the conversation rolling. Leave some material for others to contribute. Be sure that your contribution explicitly references what weve read and practiced this week. It is your classmates job to support or refute what youve said.Question 3:Lies, Damned Lies, and StatisticsActions for Lies, Damned Lies, and StatisticsThe title of this discussion topic comes from a quote often attributed to former British Prime Minister Benjamin Disraeli, who claimed that there are three types of lies: Lies, Damned Lies, and StatisticsThe (entirely fictitious) University of South Central Maryland (USCM) is being sued for sexually discriminatory hiring practices. Last year, they hired two classes of employees, administrative staff and academic staff. They received 750 applications from women for administrative staff positions, of which they hired 250, and 250 applications from women for academic positions, of which they hired 200. In total, then, they had 1000 applications from women of which they hired 450, or 45%. They received 300 applications from men for the administrative positions, of which they hired 75, and 700 applications from men for the academic positions, of which they hired 550. In total, of the 1000 applications they received from men, they hired 625, or 62.5%.Based on the numbers presented, what do you think of the discrimination claim?Question 4:Operations and production managers often use the normal distribution as a probability model to forecast demand in order to determine inventory levels; manage the supply chain; control production and service processes ; and perform quality assurance checks on products and services. The information gained from such statistical analyses help managers optimize resource allocation decisions and reduce process times, which in turn often improves contribution margins and customer satisfaction.Based on your understanding of the characteristics of the normal distribution, examine the attached chart (assume that the process specifications have a low bound of 9 and an upper bound of 15), and contribute to our discussion by posting an response to ONE of the questions below, and by responding to a post of a classmate.1. Does either of the processes below fit a normal distribution? Why or why not?2. Which processes shows more variation? What does this mean?3.Question 5:I was reading a magazine and saw an advertisement claiming that a car had the best performance in the industry on maintenance. There was actually a footnote at the bottom giving the statistics and important information. It stated the sample size and how the results were calculated. That impressed me and you do not see these footnotes often. You may feel differently. How do you feel about this? Question 6:Polling An Application of SamplingActions for Polling An Application of SamplingListen to the Econtalk podcast on polling found here:http://www.econtalk.org/archives/2008/07/rivers_on_polli.htmlIt can also be found in the webliography.What can we learn from the podcast about sampling issues? Can you think of an example from your business life where you have encountered gross errors in forecasting or estimations that you think may due the sort of issues mentioned in the podcast? Can you think of a place in your organization where polling would be a useful tool? Short of hiring Doug Rivers company, what sorts of issues do you need to keep in mind when designing a polling technique?
