Question

Question 11 1 pts An auto company claims that the fuel efficiency of its sedan has been substantially improved. A consumer advocate organization wishes to compare the fuel efficiencies of its sedan 2017 and 2019 models. Each of 12 drivers drove both the 2017 and 2019 models on a highway and the fuel efficiency was measured (in miles per gallon). The same driver drove the same path the models. between the for both Driver Model 1 2 3 4 5 6 7 8 9 10 11 12 2019 31.1 32.4 31.3 33.5 31.7 32.0 31.8 29.9 31.0 32.8 32.7 33.8 2017 28.7 32.1 29.6 30.5 31.9 30.9 32.3 33.1 29.6 30.8 31.1 31.6 Use the 0.1 level of significance to test the claim that the average fuel efficiency of the sedan has improved. Assume normal population. O reject Ho O do not reject Ho

Answer 1

20 2 2. -4だ. 2L 081 29. 13 8 04 2-25 0.09 2-3 1.9 30. 0-Oly | 22.3 |ー15:34. G 23 22-25 32. 1 299 3 29.6 ら8 1.32 0.25 0 32.3 0-64 0,4이 22- 23& 01 2 340.6 324 3-62 X Fue eficientu of sedan не 12 2.62 12-1 n-1 1DH 2 1-1 3-033

+1o Average.fr,咐c:onry Gehr has n마 "mrated thiAverage fo , effic ny ofce on hag m hoed- kevel of sgnifcanre oe 0 cienc on Test statst sp is miley-poned ushere nitn 2-2 calc 2+12-2 Sp Teale 32- d8:38 3-32 Reject-tlp_ and acept til Sedan has imooveo