condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.025247237000000002 0.0 0.050494474000000004 ZT8-11 0.06067437475 0.058104164 0.0632445855 ZT12-15 0.020849270249999996 0.018274416499999998 0.023424123999999998 ZT16-19 0.043184045500000004 0.018894416 0.06747367500000001 ZT20-23 0.116059243 0.0207009415 0.2114175445