a. Develop a scatter diagram with DJIA as the independent variable. b. Develop the estimated regression equation. c. Test for a significant relationship. Use a = .05.
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- 2. The Dow Jones Industrial Average (DJIA) and the Standard & Poor’s 500 (S&P 500) indexes are used as measures of overall movement in the stock market. The DJIA is based on the price movements of 30 large companies; the S&P 500 is an index composed of 500 stocks. Some say the S&P 500 is a better measure of stock market performance because it is broader based. The closing price for the DJIA and the S&P 500 for 15 weeks, beginning with January 6, 2012, follow (Barron’s website, April 17, 2012). must be solved on excel Date DJIA S&P January 6 12360 1278 January 13 12422 1289 January 20 12720 1315 January 27 12660 1316 February 3 12862 1345 February 10 12801 1343 February 17 12950 1362 February 24 12983 1366 March 2 12978 1370 March 9 12922 1371 March 16 13233 1404 March 23 13081 1397 March 30 13212 1408 April 5 13060 1398 April 13 12850…2. The Dow Jones Industrial Average (DJIA) and the Standard & Poor’s 500 (S&P 500) indexes are used as measures of overall movement in the stock market. The DJIA is based on the price movements of 30 large companies; the S&P 500 is an index composed of 500 stocks. Some say the S&P 500 is a better measure of stock market performance because it is broader based. The closing price for the DJIA and the S&P 500 for 15 weeks, beginning with January 6, 2012, follow (Barron’s website, April 17, 2012). must be solved on excel Date DJIA S&P January 6 12360 1278 January 13 12422 1289 January 20 12720 1315 January 27 12660 1316 February 3 12862 1345 February 10 12801 1343 February 17 12950 1362 February 24 12983 1366 March 2 12978 1370 March 9 12922 1371 March 16 13233 1404 March 23 13081 1397 March 30 13212 1408 April 5 13060 1398 April 13 12850…Dave Fletcher, the general manager of North Carolina Engineering Corporation (NCEC), thinks that his firm’s engineer-ing services contracted to highway construction firms are directly related to the volume of highway construction business contractedwith companies in his geographic area. He wonders if this is reallyso, and if it is, can this information help him plan his operationsbetter by forecasting the quantity of his engineering servicesrequired by construction firms in each quarter of the year? Thefollowing table presents the sales of his services and total amountsof contracts for highway construction over the past eight quarters: a) Using this data, develop a regression equation for predictingthe level of demand of NCEC’s services. b) Determine the coefficient of correlation and the standard errorof the estimate.
- A software organisation employs 80,000 staff members. 16,000 employees are inthe sales team, 24,000 are in the customer support team and 14,000 are in thesoftware development and HR departments. What percentage of theorganisation’s employees are a part of the finance team, if the size of the financeteam makes up two-fifths of the remainder?The emergence of giant multinational corporations is said to have altered the very nature of international economic activity. In what ways do these MNCs affect the structure and pattern of trading relationships between the developed world and the developing world?1. What is meant when talking about balking with respect to queuing theory?
- The file MidCity Download MidCitycontains data on 128 recent sales in Mid City. For each sale, the file shows the neighborhood (1, 2, or 3) in which the house is located, the number of offers made on the house, the square footage, whether the house is made primarily of brick, the number of bathrooms, the number of bedrooms, and the selling price. Neighborhoods 1 and 2 are more traditional neighborhoods, whereas neighborhood 3 is a newer, more prestigious neighborhood. PROBLEM 1: Construct 3 different confidence intervals. Part A) Sort and filter the data from the MidCity file so that you only consider the data from neighborhood 1. Construct a 99% confidence interval for the square footage of all homes in neighborhood 1. Make sure you list the specific equations you are using, ALL variables, show ALL work etc., in your report. You can use Excel to complete all computations. Remember to interpret these confidence intervals in the context of this problem. Use one Excel spreadsheet…You wish to assess whether Los Angeles has an equitable distribution of police services among its precincts compared to nearby cities. You theorize that if police resources are distributed equitably, average response times for emergency calls should be fairly similar from one precinct to another within the city. On the other hand, if response times are much higher in some precincts than others, police resources are probably not distributed as equitably as possible. You decide to compare the City of LA to the other cities in the rest of LA County. You are hypothesizing about differences in the mean between the City of LA and other cities. State in plain English the null and research hypotheses for this study.When I was a student, I was one of a relative minority who worked in addition to going to classes. That circumstance has changed drastically in the intervening years. According to several recent studies, almost all students work at least part-time, and many work full-time while enrolled in classes (ACE Center for Policy and Analysis, 2006; Alfano and Eduljee, 2013; Perna, 2010). Both faculty and administrators are concerned that the shift in focus to the world outside of school can affect academic performance. We compare the GPA of students who work at least part-time outside of class with those who do not work. What test should you use and why?
- When I was a student, I was one of a relative minority who worked in addition to going to classes. That circumstance has changed drastically in the intervening years. According to several recent studies, almost all students work at least part-time, and many work full-time while enrolled in classes (ACE Center for Policy and Analysis, 2006; Alfano and Eduljee, 2013; Perna, 2010). Both faculty and administrators are concerned that the shift in focus to the world outside of school can affect academic performance. We compare the GPA of students who work at least part-time outside of class with those who do not work. What statistical test should be used?11.1 The table showing the stock price changes for a sample of 12 companies on a day is contained in the Excel Online file below. Construct a spreadsheet to answer the following questions. Company Price Change ($) Aflac 0.79 Bank of Am. 1.44 Cablevision -0.05 Diageo 0.93 Fluor Cp 0.42 Goodrich 0.20 John.&John. 1.33 Loews Cp 0.98 Nokia 2.36 SmpraEngy 0.51 Sunoco 0.29 Tyson Food 0.13 Open spreadsheet a. Compute the sample variance for the daily price change (to 4 decimals). b. Compute the sample standard deviation for the price change (to 4 decimals). c. Provide 95% confidence interval estimates of the population variance (to 4 decimals). _____<=Sigma^2<=______ d. Provide 95% confidence interval estimates of the population standard deviation (to 4 decimals). _____<=Sigma<=______When is the consideration of ethics most important a. Data collection b. Data Analysis c. Research Planning d. All of the above