condition mean min max ZT0-3 32.8617 32.83575 32.88765 ZT4-7 48.933350000000004 48.933350000000004 48.933350000000004 ZT8-11 36.801100000000005 36.801100000000005 36.801100000000005 ZT12-15 0 0 0 ZT16-19 8.785945 8.785945 8.785945 ZT20-23 21.8778 21.8778 21.8778