64. Refer to the Lincolnwood School District bus data. a. Suppose we consider a bus \"old" if it has been in service more than 8 years. At the .01 signicance level, can we conclude that less than 40% of the district's buses are old'? Report the p-value. b. Find the median maintenance cost and the median age of the buses. Organize the data into a two-by-two contingency table, with buses above and below the median of each variable. Determine whether the age of the bus is related to the amount of the maintenance cost. Use the .05 significance level. C. Is there a relationship between the maintenance cost and the manufacturer of the bus? Use the breakdown in part (b) for the buses above and below the median maintenance cost and the bus manufacturers to create a contingency table. Use the .05 signicance level. Engine Type Maintenance Odometer ID Manufacturer (0=diesel) Capacity Cost Age Miles Miles NP 10 Keiser 1 14 4646 5 54375 11973 396 Thompson 14 2 21858 11969 O 1072 122 Bluebird 55 9394 10 116580 11967 751 Keiser 14 1078 IN 22444 11948 279 Bluebird 55 1008 2 22672 11925 OFOO 500 Bluebird 55 5329 5 50765 11922 520 Bluebird 55 4794 10 119130 11896 759 Keiser 55 3952 8 11889 O 87872 714 Bluebird 42 3742 7 10 73703 11837 11 875 Bluebird 55 4376 9 97947 11814 12 600 Bluebird 55 4832 10 119860 11800 13 953 Bluebird 55 5160 10 117700 11798 14 101 Bluebird 55 1955 41096 11789 15 358 Bluebird 55 2775 70086 11782 16 29 Bluebird 55 5352 69438 11781 17 365 Keiser OOH OP OP OP OOOOOO 55 3065 63384 11778 W O 18 162 Keiser 55 3143 31266 11757 19 686 Bluebird 55 1569 34674 11707 20 370 Keiser 55 7766 86528 11704 21 887 Bluebird 55 3743 93672 11698 22 464 Bluebird 55 2540 34530 11698 23 948 Keiser 42 4342 97956 11691 24 678 Keiser 55 3361 75229 11668 25 481 Keiser 6 3097 34362 11662 26 43 Bluebird 55 8263 102969 11615 27 704 Bluebird 55 4218 83424 11610 28 814 Bluebird 55 2028 40824 11576 79 39 Bluebird 55 5821 69444 11533 30 699 Bluebird 55 9069 98307 11518 31 75 Bluebird OOOOOH OPPOOPP 55 3011 71970 11462 32 693 Keiser 55 9193 101889 11461 33 989 Keiser 55 4795 106605 11418 34 982 Bluebird 55 505 10276 11359 35 321 Bluebird 42 2732 70122 11358 36 724 Keiser 42 3754 91968 11344 37 732 Keiser 42 4640 101196 11342 38 880 Keiser 55 8410 9 97065 1133611 11248 39 14 5922 128711 193 Thompson 4364 92457 11231 40 884 Bluebird 55 79240 11222 41 57 Bluebird 55 3190 Bluebird 42 6 68526 11168 42 731 3213 103536 11148 43 61 Keiser 55 4139 135 Bluebird 55 3560 76426 11127 44 Thompson 3920 90968 11112 45 833 14 14 6733 89792 11100 46 671 Thompson 11048 47 692 Bluebird 55 3770 8 93248 5168 10 103700 11018 48 200 Bluebird 55 Keiser 14 7380 14 146860 11003 49 754 50 540 Bluebird 55 3656 4 45284 10945 OOO O O O O O O H P P P O O O P O O O O O O O Bluebird 55 54434 10911 51 660 5213 10902 52 353 Keiser 55 4279 45744 53 482 Bluebird 55 10575 10 116534 10802 54 398 Thompson 4752 9 95922 10802 984 Bluebird 3809 10760 55 55 37664 79422 10759 56 977 Bluebird 55 3769 705 Keiser 42 47596 57 2152 10755 71538 10726 58 767 Keiser 55 2985 Bluebird 55 4563 107343 10724 59 326 110320 60 120 Keiser 42 4723 10 10674 1826 44604 10662 61 554 Bluebird 42 62 695 Bluebird 55 1061 23152 10633 9 Keiser 55 3527 46848 10591 63 Bluebird 55 9669 10 106040 10551 64 861 14 2116 44384 10518 65 603 Keiser 14 6212 12 140460 10473 66 156 Thompson 10355 67 427 Keiser 55 6927 73423 883 Bluebird 20742 10344 68 55 1881 69 168 Thompson 14 7004 83006 10315 70 954 Bluebird 42 5284 10 101000 10235 10227 71 768 Bluebird 42 3173 71778 OHOKOOKOOKOO KKK OO PP 10133 106240 72 490 Bluebird 55 10 10210 57065 10209 73 725 Bluebird 55 2356 45 Keiser 55 3124 60102 10167 74 61662 10140 75 38 Keiser 14 5976 5408 11 128117 10128 76 314 Thompson 7 72849 10095 77 507 Bluebird 55 3690 Bluebird 10 118470 10081 78 40 55 9573 5 53620 10075 79 918 Bluebird 55 2470 80 387 Bluebird 55 6863 Co 89960 10055 9 81 55 104715 10000 418 Bluebird 4513