condition mean min max ZT0-3 179.0836418 178.973967 179.1933166 ZT4-7 108.77125992500001 105.82342235000002 111.7190975 ZT8-11 140.9147289075 115.53034561499999 166.29911220000002 ZT12-15 73.8866096575 35.467171935 112.30604738 ZT16-19 29.9934717025 29.592424979999997 30.394518425 ZT20-23 30.169945884999997 29.53344426 30.806447509999998