The following data represent highway fuel consumption in miles per gallon (mpg) for a random sample of 55 models of passenger cars (Source: Environmental Protection Agency). Note: These data are also available for download at the Online Study Center. 30 27 22 25 24 25 24 15 35 35 33 52 49 10 27 18 20 23 24 25 30 24 24 24 18 20 25 27 24 32 29 27 24 27 26 25 24 28 33 30 13 13 21 28 37 35 32 33 29 31 28 28 25 29 31