Bluman A.G. Elementary Statistics- A Step By Step Approach

Section 3–1 Measures of Central Tendency 119Kurt Cobain 50 Ray Charles 10Elvis Presley 42 Marilyn Monroe 8Charles M. Schulz 35 Johnny Cash 8John Lennon 24 J.R.R. Tolkien 7Albert Einstein 20 George Harrison 7Andy Warhol 19 Bob Marley 7Theodore Geisel 10(Dr. Seuss)Source: articles.moneycentral.msn.com7. Earthquake Strengths Twelve major earthquakeshad Richter magnitudes shown here.7.0, 6.2, 7.7, 8.0, 6.4, 6.2,7.2, 5.4, 6.4, 6.5, 7.2, 5.4Which would you consider the best measure of average?Source: The Universal Almanac.a. 6.63 b. 6.45 c. 5.4, 6.2, 6.4, 7.2 d. 6.7; answers will vary8. Top-Paid CEOs The data shown are the totalcompensation (in millions of dollars) for the 50 top-paidCEOs for a recent year. Compare the averages, and statewhich one you think is the best measure.17.5 18.0 36.8 31.7 31.717.3 24.3 47.7 38.5 17.023.7 16.5 25.1 17.4 18.037.6 19.7 21.4 28.6 21.619.3 20.0 16.9 25.2 19.825.0 17.2 20.4 20.1 29.119.1 25.2 23.2 25.9 24.041.7 24.0 16.8 26.8 31.416.9 17.2 24.1 35.2 19.122.9 18.2 25.4 35.4 25.5Source: USA TODAY. 24.42; 23.45; 16.9, 17.2, 18, 19.1, 24, 25.2, 31.7;32.1. It appears that the mean and median are good measures of the average.9. Garbage Collection The amount of garbage inmillions of tons collected over a 16-year period isshown. a. 46.78 b. 47.65 c. None d. 44.0529.7 47.3 32.9 3648 57.2 53.7 52.858.4 55.8 46.1 46.437.9 43.5 50.1 52.7Source: Environmental Protection Agency.10. Foreign Workers The number of foreign workers’certificates for the New England states and thenorthwestern states is shown. Find the mean, median,and mode for both areas and compare the results.New England StatesNorthwest States6768 18703196 6221112 620819 231019 1721795 112Source: Department of Labor.11. Populations of Selected Cities Populations fortowns and cities of 5000 or more (based on the 2004figures) in the 15XXX zip code area are listed here fortwo different years. Find the mean, median, mode, andmidrange for each set of data. What do your findingssuggest?2004 199011,270 8,825 7,439 13,374 9,200 8,1338,220 5,132 8,395 9,278 4,768 9,1355,463 8,174 5,044 6,113 9,656 5,7848,739 5,282 7,869 9,229 21,923 8,2866,199 5,307 10,493 10,687 5,319 9,12610,309 14,925 8,397 11,221 15,174 9,9019,964 14,849 5,094 10,823 15,864 5,44514,340 5,707 6,672 14,292 5,748 6,961Source: World Almanac.For Exercises 12 through 21, find the (a) mean and(b) modal class.12. Executive Bonuses A random sample of bonuses (inmillions of dollars) paid by large companies to theirexecutives is shown. These data will be used forExercise 18 in Section 3–2. a. 5 b. 3.5–6.5Class boundaries Frequency0.5–3.5 113.5–6.5 126.5–9.5 49.5–12.5 212.5–15.5 113. Hourly Compensation for Production Workers Thehourly compensation costs (in U.S. dollars) for productionworkers in selected countries are represented below.Class Frequency2.48–7.48 77.49–12.49 312.50–17.50 117.51–22.51 722.52–27.52 5 a. 17.68 b. 2.48–7.48 and27.53–32.53 5 17.51–22.51. Group mean is less.Compare the mean of these grouped data to the U.S.mean of $21.97.Source: New York Times Almanac.14. Automobile Fuel Efficiency Thirty automobiles weretested for fuel efficiency (in miles per gallon). Thisfrequency distribution was obtained. (The data in thisexercise will be used in Exercise 20 in Section 3–2.)a. 19.7 b. 17.5–22.5Class boundaries Frequency7.5–12.5 312.5–17.5 517.5–22.5 1522.5–27.5 527.5–32.5 23–17