condition mean min max ZT0-3 323.1 323.1 323.1 ZT4-7 321.4 321.4 321.4 ZT8-11 196.45 196.45 196.45 ZT12-15 247.60000000000002 247.60000000000002 247.60000000000002 ZT16-19 252.89999999999998 252.89999999999998 252.89999999999998 ZT20-23 297.9 297.9 297.9