condition mean min max ZT0-3 0.5505588333333333 0.380138 0.7187675 ZT4-7 0.208903 0.208903 0.208903 ZT8-11 0.430357 0.430357 0.430357 ZT12-15 0.6098399999999999 0.520125 0.699555 ZT16-19 0.586266 0.586266 0.586266 ZT20-23 0.963179 0.963179 0.963179