condition mean min max ZT0-3 234.5 234.5 234.5 ZT4-7 206.6 206.6 206.6 ZT8-11 241.3 241.3 241.3 ZT12-15 252.7 252.7 252.7 ZT16-19 215.2 215.2 215.2 ZT20-23 208.85000000000002 208.85000000000002 208.85000000000002