condition mean min max ZT0-3 0.05226433333333333 0.05226433333333333 0.05226433333333333 ZT4-7 0.2409485 0.2409485 0.2409485 ZT8-11 0.35654050000000004 0.35654050000000004 0.35654050000000004 ZT12-15 0.1191855 0.1191855 0.1191855 ZT16-19 0.0 0.0 0.0 ZT20-23 0.037506000000000005 0.037506000000000005 0.037506000000000005