condition mean min max ZT0-3 183.68128654999998 141.0726582 226.28991489999999 ZT4-7 111.47763188833335 64.70353496 158.25172881666668 ZT8-11 95.07827198000001 75.00363255666667 115.15291140333333 ZT12-15 54.25877994 53.02686774 55.49069214 ZT16-19 44.892101413333336 44.25257198333333 45.53163084333333 ZT20-23 72.68662096333333 53.37626975 91.99697217666666