condition mean min max ZT0-3 16440.9 16440.9 16440.9 ZT4-7 16626.2 16626.2 16626.2 ZT8-11 13293.75 13293.75 13293.75 ZT12-15 9930.8 9930.8 9930.8 ZT16-19 13330.45 13330.45 13330.45 ZT20-23 16457.0 16457.0 16457.0