condition mean min max ZT0-3 51.708875 50.8207 52.597049999999996 ZT4-7 37.893299999999996 37.893299999999996 37.893299999999996 ZT8-11 43.9343 43.9343 43.9343 ZT12-15 0 0 0 ZT16-19 57.094449999999995 57.094449999999995 57.094449999999995 ZT20-23 55.589349999999996 55.589349999999996 55.589349999999996