condition mean min max ZT0-3 1868.25 1868.25 1868.25 ZT4-7 1624.1 1624.1 1624.1 ZT8-11 1422.1 1422.1 1422.1 ZT12-15 1693.1999999999998 1693.1999999999998 1693.1999999999998 ZT16-19 1778.65 1778.65 1778.65 ZT20-23 1833.05 1833.05 1833.05