condition mean min max ZT0-3 37.922925 33.22295 42.6229 ZT4-7 21.155549999999998 21.155549999999998 21.155549999999998 ZT8-11 15.421700000000001 15.421700000000001 15.421700000000001 ZT12-15 0 0 0 ZT16-19 33.4482 33.4482 33.4482 ZT20-23 27.71865 27.71865 27.71865