condition mean min max ZT0-3 0.273871875 0.14526725000000001 0.4024765 ZT4-7 0.29863249999999997 0.29863249999999997 0.29863249999999997 ZT8-11 0.43603250000000005 0.43603250000000005 0.43603250000000005 ZT12-15 0 0 0 ZT16-19 0.247983 0.247983 0.247983 ZT20-23 0.4334295 0.4334295 0.4334295