condition mean min max ZT0-3 1164.1 1164.1 1164.1 ZT4-7 1068.1 1068.1 1068.1 ZT8-11 1080.3 1080.3 1080.3 ZT12-15 1002.9 1002.9 1002.9 ZT16-19 1035.1999999999998 1035.1999999999998 1035.1999999999998 ZT20-23 1171.35 1171.35 1171.35