condition mean min max ZT0-3 0.968736 0.968736 0.968736 ZT4-7 0.29311 0.29311 0.29311 ZT8-11 0.7590874999999999 0.7590874999999999 0.7590874999999999 ZT12-15 0.867189 0.867189 0.867189 ZT16-19 1.47823 1.47823 1.47823 ZT20-23 1.0408050000000002 1.0408050000000002 1.0408050000000002