condition mean min max ZT0-3 0.38227277800000004 0.374723975 0.38982158100000003 ZT4-7 0.0195976905 0.0 0.039195381 ZT8-11 7.85425184825 2.461222031 13.2472816655 ZT12-15 16.934058043500002 15.592979199999998 18.275136887000002 ZT16-19 5.742762529 4.113130867 7.372394191 ZT20-23 0.9904627802500001 0.5835841595 1.3973414010000003