condition mean min max ZT0-3 0.3521515739833333 9.122195e-05 0.8028219999999999 ZT4-7 0.3640045 0.3640045 0.3640045 ZT8-11 1.7925550000000001 1.7925550000000001 1.7925550000000001 ZT12-15 3.1345824999999996 1.716485 4.55268 ZT16-19 1.1420629999999998 1.1420629999999998 1.1420629999999998 ZT20-23 0.29808325 0.29808325 0.29808325