condition mean min max ZT0-3 1.09324371925 0.434751854 1.7517355845 ZT4-7 1.918078358 1.89511253 1.941044186 ZT8-11 1.834825541 1.702966779 1.966684303 ZT12-15 1.79073487975 1.469428481 2.1120412785 ZT16-19 1.4829632895 1.2715353625 1.6943912165 ZT20-23 3.997783544 3.0428317515 4.9527353365