condition mean min max ZT0-3 36.099999999999994 36.099999999999994 36.099999999999994 ZT4-7 70.7 70.7 70.7 ZT8-11 93.85 93.85 93.85 ZT12-15 101.3 101.3 101.3 ZT16-19 102.35 102.35 102.35 ZT20-23 60.199999999999996 60.199999999999996 60.199999999999996