2 7 economy ratings for all cars and light trucks sold in the United States Here are the estimated miles per gallon for city driving for the 186 cars classified as midsize in 2016 arranged in increasing order MIDCARS 15 15 15 15 17 17 17 17 11 11 11 12 13 13 13 14 14 14 14 14 15 15 16 16 16 16 16 16 16 16 16 16 16 16 16 17 17 18 18 18 18 18 18 18 19 19 19 19 19 20 20 20 20 20 18 18 19 19 19 20 20 20 20 20 20 20 20 20 20 20 20 20 21 21 21 21 22 22 22 22 21 21 21 21 22 22 22 22 24 24 24 24 24 21 22 22 22 23 23 25 25 25 25 23 23 23 23 23 24 22 22 22 22 22 24 24 24 25 25 25 25 27 27 27 25 25 27 25 25 25 25 25 26 26 26 26 26 26 26 26 26 26 26 27 27 27 27 27 27 27 27 27 28 28 28 28 28 28 29 29 29 29 29 29 30 30 30 30 31 31 35 36 39 40 40 40 40 41 43 44 54 58 28 28 28 28 Fuel Economy for Midsize Cars Exercise 2 7 page 55 gives the estimated miles per gallon mpg for city driving for the 186 cars classified as midsize ir 2016 In that exercise we noted that several of the mpg values were unusuall large Which of these are suspected outliers by the 1 5 X IQR rule Although outliers can be produced by errors or incorrectly recorded observations they ar often observations that differ from the others in some particular way In thi case the cars producing the high outliers share a common feature What do yo