condition mean min max ZT0-3 545.87588815 498.32716050000005 593.4246158 ZT4-7 575.1064990250001 533.7703482000001 616.4426498500001 ZT8-11 910.1992338 699.7278535 1120.6706141 ZT12-15 1475.07673575 1450.374226 1499.7792455 ZT16-19 1206.706703975 1076.44179295 1336.971615 ZT20-23 724.3339847249999 631.9576144499999 816.7103549999999