condition mean min max ZT0-3 305.20000000000005 305.20000000000005 305.20000000000005 ZT4-7 260.8 260.8 260.8 ZT8-11 360.9 360.9 360.9 ZT12-15 287.55 287.55 287.55 ZT16-19 287.6 287.6 287.6 ZT20-23 287.45 287.45 287.45