condition mean min max ZT0-3 8263.00626 8263.00626 8263.00626 ZT4-7 5981.1281125000005 5981.1281125000005 5981.1281125000005 ZT8-11 3265.443622 3265.443622 3265.443622 ZT12-15 2573.0863425000002 2573.0863425000002 2573.0863425000002 ZT16-19 987.5199415 987.5199415 987.5199415 ZT20-23 1141.9068395 1141.9068395 1141.9068395