The following table shows median weekly earnings for men and women of different ages in 2012.Age16-2425-5455-6465+Men4609021015780Women409722760661(a) Use the data to make a 2 x 4 matrix with each row representing a gender and each column representing an age category.16-2425-5455-6465+MenWomen(b) If union members' median weekly earnings are 40% more than the earnings given in the table, use a matrix operation to find a matrixgiving the results by sex and age for union members. (Give exact answers. Do not round.)16-2425-5455-6465+MenWomen

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Answered: The following table shows median weekly…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Errors in medical prescriptions occur relatively frequently. In a study, two groups of doctors had similar err rates and one group switched to e-prescriptions while the other continued with hand-written prescriptions. C year later, the number of errors was measured. The results are given in the two-way table. No Error Error 254 Electronic 3594 Written 1478 2370 a). Fill in the row and column totals. b). What proportion of all the prescriptions had errors in them? c). What proportion of electronic prescriptions had errors in them? d). What proportion of written prescriptions had errors in them? e). What proportion of the prescriptions with errors were written prescriptions?
4. In 1983, the Department of Dairy Science at the Virginia Polytechnic Institute and State University conducted an experiment to study the effect of feed rations, differing by source of protein, on the average daily milk production of cows. There were 5 rations used in the experiment. A 5x5 Latin square was used in which the rows represented different cows and the columns were different lactation periods. The following data, recorded in kilograms, were analyzed by the Statistical Consulting Center at Virginia Tech. At the 0.01 level of significance, can we conclude that rations with different sources of protein have an effect on the average daily milk production of cows? Lactation Cows Period 1 3 4 A В C D E 1 33.1 34.4 26.4 34.6 33.9 D E A В 2 30.7 28.7 24.9 28.8 28.0 D E А В 3 28.7 28.8 20.0 31.9 22.7 E A В C D 4 31.4 22.3 18.7 31.0 21.3 B C D E A Actie Windoys Go to PC settings to activate W 28.9 22.3 15.8
The following table is of profit, revenue, and number of employees of 10 companies. Profit US $ billion Revenue/employee No. of Employees Exxon Royal Dutch British Petroleum Petrofina SA Texao In Elf Aquitaine ENI Chevron Corp. PDVSA SK 11.7 7.4 4.4 2.3 2.9 0.98 3.4 3.1 4.5 0.125 US$ 96,170 74,288 70,859 67,396 92,102 11,461 37,415 84,615 84,821 4,087 a) For the 10 companies, the mean profit per company is $ (Round answer to one decimal place.) c) The "overall" mean profit per employee is $ (Round answer to nearest whole number.) billion US. b) The "overall" mean revenue per employee (i.e., for all employees of these firms combined) of the 10 companies is US. $ (Round answer to nearest whole number.) 122900 105100 56440 69062 29311 83800 80176 39364 56597 30595 US/employee.
Many countries, especially those in Europe, have significant gold holdings. But, many of these countries also have massive debts. The following data show the total value of gold holdings in billions of U.S. dollars and the debt as a percentage of the gross domestic product for nine countries (WordPress and Trading Economics websites, February 24, 2012). Country Gold Value Debt China 63 17.7 France 146 81.7 Germany 203 83.2 Indonesia 33 69.2 Italy 147 119 Netherlands 36 63.7 Russia 50 9.9 Switzerland 62 55 U.S. 487 93.2 c. Using the entire data set, develop the estimated regression equation that can be used to predict the debt of a country given the total value of its gold holdings. d. Use residual analysis to determine whether any outliers or influential observations are present. e. Suppose that after looking at the scatter diagram in part (a) that you were able to visually identify what appears to be an influential observation. Drop this observation…
The following list gives the number of public libraries in each of 8 cities. 8, 8, 11, 7, 10, 7, 9, 9 Find the modes of this data set. If there is more than one mode, write them separated by commas. If there is no mode, click on "No mode."
House prices: The following table presents prices, in thousands of dollars, of single-family homes for 20 of the 25 largest metropolitan areas in the United States for the third quarter of 2012 and the third quarter of 2013 (information for Detroit was unavailable), Metro Area 2012 2013 Metro Area 2012 2013 Atlanta, GA 878 115.1 Philadelphia, PA 193.5 197 7 Baltimore, MD 218.1 226.5 Phoenix, AZ 129,9 169.0 Boston, MA 311.5 332.2 Portland, OR 208.6 246.5 Chicago, IL 157.2 159.4 Riverside, CA 174.3 216.7 Cincinnati, OH 112.5 121.0 St. Louis, MO 103.7 111.0 Houston, TX 152.1 163.7 San Diego, CA 359.5 412.3 Los Angeles, CA 122.1 155.1 San Francisco, CA 448.0 593.9 Miami, FL 182.0 219.9 Seattle, WA 265.4 312.6 Minneapolis, MN 147.3 170.6 Tampa, FL 131.9 141.8 New York, NY 363.8 368.2 Washington, DC 311.6 348.7 Source: National Realtors Association Send data to Excel (a) Find the mean and median price for 2012. Round the answers to at least two decimal places. (b) Find the mean and median…
The electric power consumed each month by a chemical plant is thought to be related to the average ambient temperature x1, the number of days in the month x2, the average product purity x3, and the tons of product produced x4. The past year's historical data are available and are presented in the following table. 240 25 24 91 100 236 31 21 90 95 290 45 24 88 110 274 60 25 87 88 25 26 25 301 65 91 94 316 72 94 99 300 80 87 97 84 75 296 25 86 96 267 24 88 110 276 60 25 91 105 288 50 38 25 23 90 100 261 89 98 If y= ao+a1X1 +a2x2+Q3X3+Q4X4 represents the regression model. What is the value of a2? Use 2 decimal places.
This semester, we have talked about creating random samples as well as desirable qualities of random samples. Other than randomness, one quality of random samples that we have talked about is representation. Using your knowledge of that concept, consider this problem. At a college, 29% of the students are in their first year, 27% are in their second year, 25% in their third, and 19% in their fourth. You take a survey of students and when you classify them by year of study, you have 49, 70, 56, and 25 students in their first, second, third, and fourth years respectively. The table below highlights this information. Year of School First Second Third Fourth Total College Percents Sample Counts Expected Counts 27% 70 25% 56 29% 19% 49 25 200 58 54 50 38 Under the assumption that we think the college enrollment percentages should match our sample, and that therefore our sample represents the college: a) What would the critical value be? (use a = 0.05) b) Find the test statistic to test (c)…
Ralph Lauren Corporation (RL) designs, markets, and distributes a variety of apparel, home décor, accessory, and fragrance products. The company’s products include such brands as Ralph Lauren, Polo by Ralph Lauren, and Chaps. For two recent years, the company reported the following (in millions): Year 2 Year 1 Sales $7,230 $7,451 Accounts receivable (end of year) 517 655 The accounts receivable at the beginning of Year 1 was $588 million. a. Compute the accounts receivable turnover for Year 1 and Year 2. Round to one decimal place. Year 1 Year 2 Accounts Receivable Turnover fill in the blank 1 fill in the blank 2 b. Compute the number of days’ sales in receivables for Year 1 and Year 2. Use 365 days and round all calculations to one decimal place. Year 1 Year 2 Number of Days’ Sales in Receivables fill in the blank 3 days fill in the blank 4 days
The table shows the price and number of pieces sold for a total of three products. Use the Laspeyres composite index to find out how the number of pieces sold before Christmas has changed compared to November. number of pieces price product NovemberDecemberNovemberDecember 1 98 112 105 125 2 131 275 159 100 3 95 114 110 100 а. 1,27 b. 1,64 с. 1,52 d. 0,84 Zrušit mou volbu
The table shows the leading causes of death in a certain country in a recent year. The population of the country was 311311 million. If you lived in a typical city of 500,000, how many people would you expect to die of cancercancer each year? Cause Deaths Cause Deaths Heart disease 596 comma 700596,700 Alzheimer's disease 84 comma 90084,900 Cancer 575 comma 300575,300 Diabetes 73 comma 40073,400 Chronic respiratory diseases 143 comma 100143,100 Pneumonia/Influenza 53 comma 40053,400 Stroke 128 comma 600128,600 Kidney disease 45 comma 30045,300 Accidents 122 comma 500122,500 Suicide 38 comma 60038,600 About people would be expected to die of cancer each year. (Type a whole number. Round to the nearest person as needed.)

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