51. Refer to the Lincolnville School District bus data.a. Conduct a test of hypothesis to reveal whether the mean maintenance cost is equal for each of the bus manufacturers. Use the .01 significance level. b. Conduct a test of hypothesis to determine whether the mean miles traveled since the last maintenance is equal for each bus manufacturer. Use the .05 significance level.

Data Set 3 --Lincolnville School District Bus Data Engine Type Maintenance Odometer ID Manufacturer (0=diesel) Capacity Cost Age Miles 4646 54375 Thompson 1072 21858 122 Bluebird 9394 1.16580 751 1078 22444 279 Bluebird 1008 22672 Bluebird 5329 50765 520 Bluebird 4794 1 19130 37872 714 Bluebird 3742 73703 875 Bluebird 4376 97947 500 Bluebird 4832 119860 Bluebird 5160 1.17760 Bluebird 195 Bluebird 2775 Bluebird 69438 365 Keiser 3065 63384 162 keiser 8143 31266 586 Bluebird 1569 34674 370 7766 36528 887 Bluebird 3743 93672 164 Bluebird 2540 34530 948 Keiser 1342 97956 678 keiser 3361 75229 181 3097 34362 Bluebird 8263 102969 Bluebird 1218 83424 Bluebird 2028 40824 Bluebird Bluebird 9069 98307 Bluebird 71970 Keiser 9193 101889 4795 106605 Bluebird 505 10276 Bluebird 2732 70122 724 3754 32 keiser 4640 196 880 ser 8410 65