condition mean min max ZT0-3 57.145900000000005 56.978300000000004 57.313500000000005 ZT4-7 48.063050000000004 48.063050000000004 48.063050000000004 ZT8-11 48.991299999999995 48.991299999999995 48.991299999999995 ZT12-15 0 0 0 ZT16-19 65.6518 65.6518 65.6518 ZT20-23 55.2708 55.2708 55.2708