condition mean min max ZT0-3 307.82682 307.82682 307.82682 ZT4-7 287.970105 287.970105 287.970105 ZT8-11 265.712522 265.712522 265.712522 ZT12-15 329.88704199999995 329.88704199999995 329.88704199999995 ZT16-19 254.59396600000002 254.59396600000002 254.59396600000002 ZT20-23 175.359231 175.359231 175.359231