condition mean min max ZT0-3 35.2169839075 32.126500915 38.3074669 ZT4-7 52.108610375 48.86292714 55.35429361 ZT8-11 84.3278158675 66.25867302 102.39695871499998 ZT12-15 106.95536214250001 96.822932885 117.0877914 ZT16-19 113.064123225 105.41710315 120.7111433 ZT20-23 101.7724798125 93.683853085 109.86110654000001