condition mean min max ZT0-3 0.8201045 0.472317 1.1678920000000002 ZT4-7 3.703065 3.703065 3.703065 ZT8-11 2.84169 2.84169 2.84169 ZT12-15 0 0 0 ZT16-19 1.160945 1.160945 1.160945 ZT20-23 1.5202589999999998 1.5202589999999998 1.5202589999999998