condition mean min max ZT0-3 1641.9 1641.9 1641.9 ZT4-7 1833.0 1833.0 1833.0 ZT8-11 2195.9 2195.9 2195.9 ZT12-15 2055.35 2055.35 2055.35 ZT16-19 1835.6 1835.6 1835.6 ZT20-23 1558.4 1558.4 1558.4