condition mean min max ZT0-3 123.3035 123.3035 123.3035 ZT4-7 111.8765 111.8765 111.8765 ZT8-11 100.0912 100.0912 100.0912 ZT12-15 106.6125 106.6125 106.6125 ZT16-19 167.4725 167.4725 167.4725 ZT20-23 149.02249999999998 149.02249999999998 149.02249999999998