The detected speed in km/hr of 60 vehicles (n=60) in a carriageway is tabulated below:

Vehicle Speed Vehicle Speed Vehicle Speed Vehicle Speed number (km/hr) number (km/hr) number (km/hr) number (km/hr) 46.5 16 44 31 51 46 47.5 2 51.5 17 52 32 38.5 47 52 W 47.5 18 47.5 33 52.5 48 52.5 52 19 53.5 34 46.5 49 39 U 47 20 52 35 47.5 50 52 O 50 21 49.5 36 47 51 51 45.5 22 37 37 47 52 57.5 co 44 23 49 38 45 53 41.5 45.5 24 49.5 39 49.5 54 50 10 52.5 25 57.5 40 41.5 55 48 11 46 26 52 41 43.5 56 49 12 41 27 48 42 52.5 57 45.5 13 48.5 28 42.5 43 43 58 45.5 14 54.5 29 46 44 46 59 44 15 47.5 30 40 45 44 60 55.5