condition mean min max ZT0-3 1252.4 1252.4 1252.4 ZT4-7 755.0 755.0 755.0 ZT8-11 794.5999999999999 794.5999999999999 794.5999999999999 ZT12-15 933.7 933.7 933.7 ZT16-19 993.25 993.25 993.25 ZT20-23 1068.25 1068.25 1068.25