condition mean min max ZT0-3 155.457769 155.457769 155.457769 ZT4-7 390.02311999999995 390.02311999999995 390.02311999999995 ZT8-11 722.0967005 722.0967005 722.0967005 ZT12-15 621.8772215 621.8772215 621.8772215 ZT16-19 359.0479715 359.0479715 359.0479715 ZT20-23 135.12692149999998 135.12692149999998 135.12692149999998