31. Mortgage Industry Employees. In an issue of National Mort-gage News, a special report was published on publicly traded mort-gage industry companies. A sample of 25 mortgage industry compa-nies had the following numbers of employees.260 20,8003,2231,8012,073 3,5962,1281,79617,5401529,2726,9292,4687,0006,6002,4583,2162097269,2006504,80019,40024,8863,082a. Obtain a normal probability plot of the data.b. Use part (a) to identify any outliers.c. Use part (a) to assess the normality of the variable underconsideration.

Given data: 260, 3223, 29272, 2458, 650, 20800, 2128, 6929, 3216, 4800, 1801, 1796, 2468, 209,…

Answered: 31. Mortgage Industry Employees. In an…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Find the five-number summary for the given data (use hinges). The weekly salaries (in dollars) of sixteen govemment workers are listed below. 482 671 605 710 888 494 903 670 790 930 924 495 691 540 730 650 A. 482, 572.5, 681.0, 888, 930 B. 482, 572.5, 681.0, 839.0, 930 O C. 482, 605, 681.0, 790, 930 D. 482, 540, 681.0, 888, 930 O E. 482, 540, 681.0, 839.0, 930 O 0 0 0
A certain company will purchase the house of any employee who is transferred out of state and will handle all details of reselling the house. The purchase price is based on two assessments, one assessor being chosen by the employee and one by the company. Based on the sample of eight assessments shown, do the two assessors agree? Use the .01 level of significance. Assessments of Eight Homes ($ thousands) Assessed by Home 1 Home 2 Home 3 Home 4 Home 5 Home 6 Home 7 Home 8 Company 330 345 452 270 298 286 537 744 Employee 317 350 473 280 307 283 523 769 Click here for the Excel Data File (a) Choose the appropriate hypotheses. Assume d = company assessed value – employee assessed value. multiple choice 1 H0: μd = 0 versus H1: μd ≠ 0. H0: μd ≠ 0 versus H1: μd = 0. (b) State the decision rule for .01 level of significance. (Round your answers to 2 decimal places. A negative value should be indicated by a minus sign.) Reject the null hypothesis if tcalc < or…
The following table shows the number of active military personnel in 2009, by region (including the District of Columbia). Pacific 229,634 Mountain 89,816 West South Central 177,336 West North Central 64,564 East North Central 26,384 East South Central 68,440 South Atlantic 376,034 Middle Atlantic 41,441 New England 8,579 Source: U.S. Census Bureau, Statistical Abstract of the United States: 2012, Table 508 (data) and U.S. Census Bureau, Census Regions and Divisions of the United States (regions). Calculate the mean and standard deviation for the population. Now take 10 samples of size 3 from the population. Use either simple random sampling or systematic sampling with the help of the table of random numbers in Appendix A. Calculate the mean for each sample. Once you have calculated the mean for each sample, calculate the mean of means (i.e., add up your 10 sample means and divide by 10). How does this mean compare with the mean for all…
Listed below are the annual tuition amounts of the 10 most expensive colleges in a country for a recent year. What does this "Top 10" list tell us about the population of all of that country's college tuitions? $51,456 $50,679 $52,816 $52,816 $51,393 O $54,026 $52,892 $52,719 $50,536 $51,633 --..- Find the mean, midrange, median, and mode of the data set. The mean of the data set is $ (Round to two decimal places as needed.)
26. A survey conducted by the Bureau of Labor Statistics found that 67% of high school graduating class of 2007 went on to college the following year, while 44% of the class was working. Furthermore, 92% were either in college or working, or both. a. What percentage went on to college and work at the same time? b. What percentage went on to college but not work? c. What percentage were neither in college nor work?
18. A poll was taken of 14,056 working adults aged 40-70 to determine their level of education. The participants were classified by sex and by level of education. The results were as follows. Male Female Total Education Level High School or Less Bachelor's Degree 3141 2434 5575 3619 3761 7380 472 Master's Degree 534 52 43 7346 6710 14,056 1006 95 Ph.D. Total A person is selected at random. Compute the following probabilities: (d) The probability that the selected person is male, given he has a Master's degree (e) The probability that the selected person does not have a Master's degree, given it is a male (f) The probability that the selected person is female, given that she has a Bachelor's degree (g) The probability that the selected person has a Ph.D, given it is a female
3. The director of library services at Fairmont College did a survey of types of books (by subject) in the circulation library. Then she used library records to take a random sample of 4217 books checked out last term and classified the books in the sample by subject. The results are shown below. Subject Area % Books in Circ Library on this Subject No. of Books in the Sample on this Subject Business 32% 1210 Humanities 25% 956 Natural Science 20% 940 Social Science 15% 814 Other Subject 8% 297 Using a 5% level of significance, test the claim that the subject distribution of books in the library fits the distribution of books checked out by students.
The Department of the Census provides the following data table. single married widowed divorced total Male .129 .298 .013 .040 .48 Female .305 .057 .054 .52 Total .233 .603 .070 .094 1.0 a) Fill in the missing word for each of the totals. (What is being totaled in each column/row?) b) Find P(Widowed and Male). = .013 c) Find P(Widowed)=.070 d) Find P(Married or Female). Write out the formula you use so I know that you know what you are doing. e) Find P(Widowed and Divorced). Explain your answer. f) Are Divorced and Male Mutually Exclusive events. Why or why not?
11. The city council of Pine Bluffs is considering increasing the number of police in an effort to reduce crime. Before making a final decision, the council asks the Chief of Police to survey other cities of similar size to determine the relationship between the number of police and the number of crimes reported. The Chief gathered the following sample information. City Police Number of Crimes Oxford 15 17 Starkville 17 13 Danville 25 Athens 27 Holgate 17 Carey 12 21 Whistler 11 19 Woodville 22 6. a. If we want to estimate crimes based on the number of police, which variable is the dependent variable, and which is the independent variable? According to the regression output shown below: . reg y x Source df MS Number of obs - 8 F( 1, 6) - 19.49 Model 222.393634 1 222.393634 Prob > F 0.0045 Residual 68.4813665 6. 11.4135611 R-squared 0.7646 Adj R-squared - 0.7253 Total 290.875 7 41.5535714 Root MSE 3.3784 Coef. Std. Err. P>|t| [95% Conf. Interval] -.9596273 .2173962 -4.41 0.004 -1.491577…
1. A researcher is interested in the texting habits of high schools students in the United States. The researcher selects a group of 200 students, measures the number of text messages that each individual sends each day (for a single week), and calculates the average number for the group. a. Identify the population for the study. b. Identify the sample for this study. c. The average number calculated is an example of what?
1. The United States Environmental Protection Agency6 reports that in 2006, each American generated 4.6 pounds of solid waste a day. (a) Does this mean every single American pro duces the same amount of garbage? What do you think this statement means? (b) Was the number 4.6 obtained from a sam ple? Explain. (c) How would you select a sample?
15 Projected undernourished individuals. In 2020, The FAO, IFAD, UNICEF, WFP, and WHO published a brief .... NOURISH report on the state of food security and nutrition in the world. There were 687.8 million undernourished people in the world in 2019. One of the sections in the report shows the distribution of these people as shown in the following table: Region Africa Asia Northern America and Europe Oceania Latin America and the Caribbean Percentage of undernourished people (%) 36.4 55.4 0.9 0.4 6.9 a. Describe the variable measured in the table. b. These results were displayed in the form of a pie chart. Reconstruct the pie chart from the information given in the table. c. How many of the 687.8 million undernourished people in the world in 2019 were in Africa? d. As Africa has many third world countries, people might expect Africa to have the highest number of undernour- ished people in the world. Does the information in the pie chart, part b, support this contention? Explain why or…

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