condition mean min max ZT0-3 304.45 304.45 304.45 ZT4-7 162.5 162.5 162.5 ZT8-11 178.39999999999998 178.39999999999998 178.39999999999998 ZT12-15 202.2 202.2 202.2 ZT16-19 216.39999999999998 216.39999999999998 216.39999999999998 ZT20-23 226.1 226.1 226.1