The New Streamer Four-Cylinder Compact Is Advertised as Obtaining 39

Essay

The new Streamer four-cylinder compact is advertised as obtaining 39.2 miles per gallon (estimated highway mileage). A competitor doubts their claim and tests a sample of Streamers under highway conditions with the following results (in m.p.g.): 35, 41, 36, 32, 40, 38, 38, 36. Do these results cast doubt on the advertised claim??
(a)Set up

and


(b) Determine the critical value(s) of

(c)Perform the statistical test.
(d)Draw final conclusions.