condition mean min max ZT0-3 708.2173313 307.4221249 1109.0125377 ZT4-7 857.147087975 800.03941815 914.2547578000001 ZT8-11 906.007622175 813.5377062499999 998.4775381000001 ZT12-15 410.20912423749996 210.07579727499999 610.3424511999999 ZT16-19 119.758111975 106.8756802 132.64054375 ZT20-23 161.621028525 160.30968380000002 162.93237325