condition mean min max ZT0-3 39.6055 29.73695 49.47405 ZT4-7 27.713549999999998 27.713549999999998 27.713549999999998 ZT8-11 14.295449999999999 14.295449999999999 14.295449999999999 ZT12-15 0 0 0 ZT16-19 39.19825 39.19825 39.19825 ZT20-23 89.44495 89.44495 89.44495