condition mean min max ZT0-3 286.88107075 251.24665359999997 322.5154879 ZT4-7 276.66146295000004 262.85374675 290.46917915000006 ZT8-11 446.92524134999996 349.9512526 543.8992301 ZT12-15 451.48743532500004 352.52229845 550.4525722000001 ZT16-19 333.94686824999997 280.28399985 387.60973664999995 ZT20-23 187.581594625 155.13648955000002 220.0266997