condition mean min max ZT0-3 1497.679969 1497.679969 1497.679969 ZT4-7 1464.0703065 1464.0703065 1464.0703065 ZT8-11 1590.5378865 1590.5378865 1590.5378865 ZT12-15 1669.155121 1669.155121 1669.155121 ZT16-19 1523.153229 1523.153229 1523.153229 ZT20-23 1708.193636 1708.193636 1708.193636