Frequency Distribution - Quantitative Maintenance lower 320 340 360 380 400 420 440 460 480 500 520 540 560 Histogram 20.0 Percent 18.0 16.0 14.0 12.0 10.0 8.0 6.0 4.0 2.0 0.0 Maintenance Descriptive statistics Maintenance count 80 mean 450.29 sample variance 2,882.18 sample standard deviation 53.69 minimum 329 maximum 570 range 241 1st quartile 420.00 upper < < < < < < < < < < < < < 340 360 380 400 420 440 460 480 500 520 540 560 580 midpoint width 330 20 350 20 370 20 390 20 410 20 430 20 450 20 470 20 490 20 510 20 530 20 550 20 570 20 frequency 3 3 1 8 5 12 12 15 7 8 1 3 2 80 median 3rd quartile interquartile range mode low extremes low outliers high outliers high extremes 456.00 489.75 69.75 329.00 0 0 0 0 Frequency Distribution - Quantitative Maintenance lower upper 300 350 400 450 500 550 < < < < < < 350 400 450 500 550 600 midpoint width 325 50 375 50 425 50 475 50 525 50 575 50 frequency 3 12 22 29 11 3 80 midpoint width 343 35 378 35 413 35 448 35 483 35 frequency 6 8 12 20 20 Histogram Percent 40.0 35.0 30.0 25.0 20.0 15.0 10.0 5.0 0.0 Maintenance Frequency Distribution - Quantitative Maintenance lower 325 360 395 430 465 upper < < < < < 360 395 430 465 500 500 535 570 < < < 535 570 605 518 553 587 35 35 35 Histogram Percent 30.0 25.0 20.0 15.0 10.0 5.0 0.0 Maintenance Descriptive statistics count mean sample variance sample standard deviation minimum maximum range 1st quartile median 3rd quartile interquartile range mode Miles 80 827.53 1,188.20 34.47 741 908 167 806.00 827.00 851.50 45.50 815.00 low extremes low outliers high outliers high extremes 0 0 0 0 BoxPlot 1/28/2010 16:03.39 (1) 600 650 700 750 Miles 800 850 900 950 9 4 1 80 BoxPlot 600 650 700 750 Miles 800 850 900 950 850 900 950 850 900 950 Descriptive statistics count mean sample variance sample standard deviation minimum maximum range 1st quartile median 3rd quartile interquartile range mode Miles 80 827.53 1,188.20 34.47 741 908 167 806.00 827.00 851.50 45.50 815.00 low extremes low outliers high outliers high extremes 0 0 0 0 BoxPlot 1/28/2010 16:06.08 (1) 600 650 700 750 Miles 800 1/28/2010 DotPlot16:06.08 (1) 600 650 Descriptive statistics 700 750 Miles 800 Miles 80 830.11 1,779.85 42.19 741 1008 267 count mean sample variance sample standard deviation minimum maximum range 1st quartile median 3rd quartile interquartile range mode 806.00 827.00 851.50 45.50 815.00 low extremes low outliers high outliers high extremes 0 0 1 1 BoxPlot 1/28/2010 16:08.20 (1) 600 650 700 750 800 850 Miles 900 950 1000 1050 950 1000 1050 1/28/2010 DotPlot16:08.20 (1) 600 650 700 750 800 850 Miles 900 Correlation Matrix Maintenance Age Miles Maintenance 1.000 .465 .450 Age Miles 1.000 .522 1.000 80 sample size .220 critical value .05 (two-tail) .286 critical value .01 (two-tail) percent 3.8 3.8 1.3 10.0 6.3 15.0 15.0 18.8 8.8 10.0 1.3 3.8 2.5 100.0 cumulative frequency percent 3 3.8 6 7.5 7 8.8 15 18.8 20 25.0 32 40.0 44 55.0 59 73.8 66 82.5 74 92.5 75 93.8 78 97.5 80 100.0 percent 3.8 15.0 27.5 36.3 13.8 3.8 100.0 percent 7.5 10.0 15.0 25.0 25.0 cumulative frequency percent 3 3.8 15 18.8 37 46.3 66 82.5 77 96.3 80 100.0 cumulative frequency percent 6 7.5 14 17.5 26 32.5 46 57.5 66 82.5 11.3 5.0 1.3 100.0 75 79 80 93.8 98.8 100.0 Data Set 3 --Buena School District Bus Data Bus Number X1 Maintenance X2 Age X3 Miles X4 Type X5 Bus-Mfg X6 Passenger X7 135 120 200 40 427 759 10 880 481 387 326 861 122 156 887 686 490 370 464 875 883 57 482 704 989 731 75 162 732 751 600 948 358 833 692 61 9 314 329 503 505 466 359 546 427 474 382 422 433 474 558 561 357 329 497 459 355 489 436 455 514 503 380 432 478 406 471 444 493 452 461 496 469 442 414 459 7 10 10 10 7 8 5 9 3 8 9 10 10 12 8 3 10 8 3 9 2 7 11 8 9 6 6 3 9 2 10 9 6 8 8 9 4 11 853 883 822 865 751 870 780 857 818 869 848 845 885 838 760 741 859 826 806 858 785 828 980 857 803 819 821 798 815 757 1008 831 849 839 812 809 864 859 Diesel Diesel Diesel Gasoline Gasoline Diesel Gasoline Gasoline Gasoline Gasoline Diesel Gasoline Gasoline Diesel Diesel Diesel Gasoline Gasoline Gasoline Diesel Gasoline Diesel Gasoline Diesel Diesel Diesel Diesel Gasoline Diesel Diesel Diesel Diesel Diesel Diesel Diesel Diesel Gasoline Diesel Bluebird Keiser Bluebird Bluebird Keiser Keiser Keiser Keiser Keiser Bluebird Bluebird Bluebird Bluebird Thompson Bluebird Bluebird Bluebird Keiser Bluebird Bluebird Bluebird Bluebird Bluebird Bluebird Keiser Bluebird Bluebird Keiser Keiser Keiser Bluebird Keiser Bluebird Thompson Bluebird Keiser Keiser Thompson 55 Passenger 42 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 14 Passenger 55 Passenger 6 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 6 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 42 Passenger 55 Passenger 55 Passenger 42 Passenger 14 Passenger 55 Passenger 42 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 6 Passenger 396 365 398 43 500 279 693 884 977 38 725 982 724 603 168 45 754 39 671 418 984 953 507 540 695 193 321 918 101 714 678 768 29 554 767 699 954 705 660 520 814 353 457 462 570 439 369 390 469 381 501 432 392 441 448 468 467 478 515 411 504 504 392 423 410 529 477 540 450 390 424 433 428 494 396 458 493 475 476 403 337 492 426 449 2 6 9 9 5 2 9 9 7 6 5 1 8 4 7 6 14 6 8 9 8 10 7 4 2 11 6 5 4 7 7 7 6 4 6 9 10 4 6 10 4 4 815 799 844 832 842 792 775 882 874 837 774 823 790 800 827 830 895 804 866 842 851 835 866 846 802 847 856 799 827 817 842 815 784 817 816 816 827 806 819 836 757 817 Diesel Diesel Diesel Gasoline Gasoline Diesel Gasoline Diesel Diesel Gasoline Diesel Diesel Diesel Diesel Gasoline Diesel Diesel Gasoline Gasoline Diesel Diesel Diesel Diesel Gasoline Diesel Diesel Diesel Diesel Diesel Diesel Diesel Diesel Gasoline Diesel Diesel Gasoline Diesel Diesel Gasoline Diesel Diesel Gasoline Thompson Keiser Thompson Bluebird Bluebird Bluebird Keiser Bluebird Bluebird Keiser Bluebird Bluebird Keiser Keiser Thompson Keiser Keiser Bluebird Thompson Bluebird Bluebird Bluebird Bluebird Bluebird Bluebird Thompson Bluebird Bluebird Bluebird Bluebird Keiser Bluebird Bluebird Bluebird Keiser Bluebird Bluebird Keiser Bluebird Bluebird Bluebird Keiser 55 Passenger 55 Passenger 14 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 14 Passenger 55 Passenger 55 Passenger 42 Passenger 14 Passenger 55 Passenger 55 Passenger 14 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 6 Passenger 55 Passenger 55 Passenger 42 Passenger 55 Passenger 42 Passenger 55 Passenger 14 Passenger 55 Passenger 55 Passenger 42 Passenger 42 Passenger 55 Passenger 55 Passenger 55 Passenger 55 Passenger 76. Refer to the Buena School District bus data. a. Refer to the maintenance cost variable. The mean maintenance cost for last year is $450.29, with a standard deviation of $53.69. Estimate the number of buses with a cost of more than $500. Compare that with the actual number. b. Refer to the variable on the number of miles driven. The mean is 830.11 and the standard deviation is 42.19 miles. Estimate the number of buses traveling more than 900 miles. Compare that number with the actual value. nd the standard 53. Management at Gordon Electronics is considering adopting a bonus system to increase production. One suggestion is to pay a bonus on the highest 5% of production based on past experience. Past records indicate weekly production follows the normal distribution. The mean of this distribution is 4,000 units per week and the standard deviation is 60 units per week. If the bonus is paid on the upper 5% of production, the bonus will be paid on how many units or more? 55. Best Electronics Inc. offers a \"no hassle\" returns policy. The number of items returned per day follows the normal distribution. The mean number of customer returns is 10.3 per day and the standard deviation is 2.25 per day. a. In what percent of the days are there eight or fewer customers returning items? b. In what percent of the days are between 12 and 14 customers returning items? c. Is there any chance of a day with no returns? 45. An auditor for Health Maintenance Services of Georgia reports 40% of policyholders or older submit a claim during the year. Fifteen policyholders are randomly selected for company records. a. How many of the policyholders would you expect to have filed a claim within the last year? b. What is the probability that 10 of the selected policyholders submitted a claim last year? c. What is the probability that 10 or more of the selected policyholders submitted a claim last year? d. What is the probability that more than 10 of the selected policyholders submitted a claim last year? orgia reports 40% of policyholders 55 years holders are randomly selected for have filed a claim within the last holders submitted a claim last ed policyholders submitted a claim cted policyholders submitted a