condition mean min max ZT0-3 70.984581075 67.65028686 74.31887529 ZT4-7 56.0247023225 49.31741794 62.731986705 ZT8-11 140.2045399225 102.93993269500001 177.46914715 ZT12-15 98.72654080499998 60.45432644 136.99875516999998 ZT16-19 33.151908129999995 29.2466705 37.05714576 ZT20-23 28.2375491425 27.786865225 28.68823306