condition mean min max ZT0-3 65.8108 65.8108 65.8108 ZT4-7 49.025800000000004 49.025800000000004 49.025800000000004 ZT8-11 59.1517 59.1517 59.1517 ZT12-15 82.96495 82.96495 82.96495 ZT16-19 86.17235 86.17235 86.17235 ZT20-23 79.22595000000001 79.22595000000001 79.22595000000001