condition mean min max ZT0-3 0.22587368324999998 0.2017309075 0.25001645899999997 ZT4-7 2.2039295977499997 0.3847023465 4.023156848999999 ZT8-11 9.029947344250001 7.6062520535 10.453642635 ZT12-15 3.532344411 2.6441838669999997 4.420504955 ZT16-19 3.9202068669999997 3.0478775259999997 4.792536208 ZT20-23 4.10491003075 4.029022718 4.1807973435